Allocator benchmark report

Suite core-throughput-v1; source 68ccee0e47bbb4052d2827556ff6db175b740743; runner github-hosted. Intervals are informational.

Throughput

Scenario	Threads	Allocator	Median	Noisy
tiny-fixed-16	1	tcmalloc	7545880.6423569685	no
tiny-fixed-16	1	jemalloc	8381079.507855639	no
tiny-fixed-16	1	upstream-mimalloc	8405573.962893752	no
tiny-fixed-16	1	mimalloc-pprof	8093420.401583627	no
tiny-fixed-16	physical-core	tcmalloc	3544273.3674406996	no
tiny-fixed-16	physical-core	jemalloc	7117755.644597217	no
tiny-fixed-16	physical-core	upstream-mimalloc	6655510.65074441	no
tiny-fixed-16	physical-core	mimalloc-pprof	7267868.684057941	no
tiny-fixed-64	1	tcmalloc	3305786.2204059935	no
tiny-fixed-64	1	jemalloc	3450477.9581925627	no
tiny-fixed-64	1	upstream-mimalloc	3456407.850158668	no
tiny-fixed-64	1	mimalloc-pprof	3415923.129937476	no
tiny-fixed-64	physical-core	tcmalloc	3214459.4695795737	no
tiny-fixed-64	physical-core	jemalloc	4738531.372034719	no
tiny-fixed-64	physical-core	upstream-mimalloc	5027957.057297653	no
tiny-fixed-64	physical-core	mimalloc-pprof	4685951.292301319	no
small-log-mixed	1	tcmalloc	4057315.2595148245	yes
small-log-mixed	1	jemalloc	4197092.146816096	yes
small-log-mixed	1	upstream-mimalloc	4269846.567264064	yes
small-log-mixed	1	mimalloc-pprof	4140132.841496667	yes
small-log-mixed	physical-core	tcmalloc	3660176.6948335613	yes
small-log-mixed	physical-core	jemalloc	5584525.071150948	yes
small-log-mixed	physical-core	upstream-mimalloc	5302833.9226538865	yes
small-log-mixed	physical-core	mimalloc-pprof	5518555.113877075	yes
small-log-mixed	2x-logical	tcmalloc	5414286.777691724	yes
small-log-mixed	2x-logical	jemalloc	6276090.05845438	yes
small-log-mixed	2x-logical	upstream-mimalloc	6117645.033378492	yes
small-log-mixed	2x-logical	mimalloc-pprof	6163733.155713252	yes
medium-log-mixed	1	tcmalloc	16223.604983686302	yes
medium-log-mixed	1	jemalloc	16216.593567307129	yes
medium-log-mixed	1	upstream-mimalloc	16530.36167208393	yes
medium-log-mixed	1	mimalloc-pprof	16417.19265310052	yes
medium-log-mixed	physical-core	tcmalloc	27771.910530345012	yes
medium-log-mixed	physical-core	jemalloc	28351.059833494226	yes
medium-log-mixed	physical-core	upstream-mimalloc	27684.913318571984	yes
medium-log-mixed	physical-core	mimalloc-pprof	28015.021337561782	yes
large-objects	1	tcmalloc	3832.421117772495	yes
large-objects	1	jemalloc	2691.933726203141	yes
large-objects	1	upstream-mimalloc	3916.6201184748325	yes
large-objects	1	mimalloc-pprof	3875.415393958711	yes
large-objects	2	tcmalloc	6543.06792873167	yes
large-objects	2	jemalloc	4702.545798223904	yes
large-objects	2	upstream-mimalloc	6924.250066723562	yes
large-objects	2	mimalloc-pprof	6973.4083358262415	yes
batch-lifo	1	tcmalloc	61827.24403813347	no
batch-lifo	1	jemalloc	62284.24095668758	no
batch-lifo	1	upstream-mimalloc	62177.408740354345	no
batch-lifo	1	mimalloc-pprof	61793.43536023248	no
batch-lifo	physical-core	tcmalloc	111284.3419060189	no
batch-lifo	physical-core	jemalloc	120032.9546595969	no
batch-lifo	physical-core	upstream-mimalloc	114453.50896751203	no
batch-lifo	physical-core	mimalloc-pprof	114809.72516984223	no
batch-fifo	1	tcmalloc	62349.16946663458	no
batch-fifo	1	jemalloc	63391.65821105359	no
batch-fifo	1	upstream-mimalloc	63489.991843992706	no
batch-fifo	1	mimalloc-pprof	62905.09039775657	no
batch-fifo	physical-core	tcmalloc	112168.60537923934	no
batch-fifo	physical-core	jemalloc	120287.0679902261	no
batch-fifo	physical-core	upstream-mimalloc	115093.24478120616	no
batch-fifo	physical-core	mimalloc-pprof	114974.70074972053	no
cross-thread-producer-consumer	2	tcmalloc	84906.69688838985	yes
cross-thread-producer-consumer	2	jemalloc	78412.92133113567	no
cross-thread-producer-consumer	2	upstream-mimalloc	79088.92685435926	no
cross-thread-producer-consumer	2	mimalloc-pprof	83586.55115389734	no
cross-thread-producer-consumer	physical-core	tcmalloc	80812.75012833974	yes
cross-thread-producer-consumer	physical-core	jemalloc	82241.27354850987	yes
cross-thread-producer-consumer	physical-core	upstream-mimalloc	81548.12487637867	no
cross-thread-producer-consumer	physical-core	mimalloc-pprof	81928.5370812447	yes
random-ownership	physical-core	tcmalloc	79470.49827224389	yes
random-ownership	physical-core	jemalloc	83471.13476595549	no
random-ownership	physical-core	upstream-mimalloc	80671.41002144033	no
random-ownership	physical-core	mimalloc-pprof	79801.90428675117	yes
realloc-geometric	1	tcmalloc	91622.47528901536	yes
realloc-geometric	1	jemalloc	92904.71392374512	yes
realloc-geometric	1	upstream-mimalloc	92352.1575526906	yes
realloc-geometric	1	mimalloc-pprof	94274.53457684632	yes
realloc-geometric	physical-core	tcmalloc	154682.54397129707	yes
realloc-geometric	physical-core	jemalloc	171547.07462143438	yes
realloc-geometric	physical-core	upstream-mimalloc	167407.91530428533	yes
realloc-geometric	physical-core	mimalloc-pprof	168706.26016336898	yes
calloc-zero	1	tcmalloc	550182.3578601687	yes
calloc-zero	1	jemalloc	555756.1954376169	yes
calloc-zero	1	upstream-mimalloc	553589.8817834938	yes
calloc-zero	1	mimalloc-pprof	552812.0801015475	yes
calloc-zero	physical-core	tcmalloc	913652.9836098651	yes
calloc-zero	physical-core	jemalloc	999115.498303532	yes
calloc-zero	physical-core	upstream-mimalloc	979395.1391712097	yes
calloc-zero	physical-core	mimalloc-pprof	985761.0438400115	yes
aligned-range	1	tcmalloc	217326.18284680945	yes
aligned-range	1	jemalloc	215432.95826379547	yes
aligned-range	1	upstream-mimalloc	212713.4762243026	yes
aligned-range	1	mimalloc-pprof	211027.50465588435	yes
aligned-range	physical-core	tcmalloc	306700.4049279767	yes
aligned-range	physical-core	jemalloc	320792.7740233293	yes
aligned-range	physical-core	upstream-mimalloc	314844.91340613086	yes
aligned-range	physical-core	mimalloc-pprof	317181.52466210496	yes
sawtooth-retain-drain	1	tcmalloc	1383.3665917893843	no
sawtooth-retain-drain	1	jemalloc	1384.5261351189215	no
sawtooth-retain-drain	1	upstream-mimalloc	1414.4845577626645	no
sawtooth-retain-drain	1	mimalloc-pprof	1402.5459589376	no
sawtooth-retain-drain	physical-core	tcmalloc	2578.272560905736	yes
sawtooth-retain-drain	physical-core	jemalloc	2618.2329223730103	no
sawtooth-retain-drain	physical-core	upstream-mimalloc	2535.3201766341904	yes
sawtooth-retain-drain	physical-core	mimalloc-pprof	2555.90246759718	no
thread-churn	1	tcmalloc	23411.376708381893	no
thread-churn	1	jemalloc	16645.626811149872	no
thread-churn	1	upstream-mimalloc	21569.912763143555	no
thread-churn	1	mimalloc-pprof	21579.80376808342	no
thread-churn	physical-core	tcmalloc	33012.26303682117	no
thread-churn	physical-core	jemalloc	23898.063589501795	no
thread-churn	physical-core	upstream-mimalloc	30859.79959898316	no
thread-churn	physical-core	mimalloc-pprof	30276.2993654402	no
representative-mix	1	tcmalloc	62438.6138019305	yes
representative-mix	1	jemalloc	62587.80374147769	yes
representative-mix	1	upstream-mimalloc	62801.87241657531	yes
representative-mix	1	mimalloc-pprof	62588.84629689488	yes
representative-mix	physical-core	tcmalloc	102625.24758939153	yes
representative-mix	physical-core	jemalloc	105919.72384936051	yes
representative-mix	physical-core	upstream-mimalloc	103876.07734926196	yes
representative-mix	physical-core	mimalloc-pprof	102341.36141793292	yes

Linux process memory

Sampled peak RSS normalized to upstream-mimalloc; 1.0 equals upstream; lower is better

Speed-memory Pareto scatter: fragmentation proxy versus median throughput; upper-left is better

Linux process RSS over time with workload-drained marker and post-drain return-to-OS points; lower is better

Fragmentation proxy ratio bars with a 1.0 reference line; lower is better

Externally sampled from /proc/<pid>/smaps_rollup every 5000000 ns with VmHWM cross-checks and natural purge only. The bar chart normalizes sampled peak RSS to upstream-mimalloc = 1.0 (matching the throughput panel), with absolute MiB in the table below. The Pareto scatter pairs each allocator's fragmentation proxy with its median throughput on the matching scenario/thread cell; upper-left is better. The timeline shows RSS growth, the workload-drained marker, and the 100 ms / 1 s / 5 s post-drain points so return-to-OS behavior is visible. Runner: github-hosted; results are informational. Memory run 31937843446/1; metric key 1468306e3d8599b3565faf026ea961ad2ff1b0dbf604441f06661889dfa11731.

Scenario	Threads	Metric	Allocator	Median (MiB or ratio)	vs upstream
large-objects	1	sampled-peak-rss-bytes	tcmalloc	35.707	1.52x
large-objects	1	sampled-peak-rss-bytes	jemalloc	35.238	1.50x
large-objects	1	sampled-peak-rss-bytes	upstream-mimalloc	23.434	1.00x
large-objects	1	sampled-peak-rss-bytes	mimalloc-pprof	23.453	1.00x
large-objects	1	post-drain-rss-100ms-bytes	tcmalloc	35.691	-
large-objects	1	post-drain-rss-100ms-bytes	jemalloc	11.227	-
large-objects	1	post-drain-rss-100ms-bytes	upstream-mimalloc	23.434	-
large-objects	1	post-drain-rss-100ms-bytes	mimalloc-pprof	23.453	-
large-objects	1	post-drain-rss-1s-bytes	tcmalloc	35.691	-
large-objects	1	post-drain-rss-1s-bytes	jemalloc	11.227	-
large-objects	1	post-drain-rss-1s-bytes	upstream-mimalloc	23.434	-
large-objects	1	post-drain-rss-1s-bytes	mimalloc-pprof	23.453	-
large-objects	1	post-drain-rss-5s-bytes	tcmalloc	35.691	-
large-objects	1	post-drain-rss-5s-bytes	jemalloc	11.227	-
large-objects	1	post-drain-rss-5s-bytes	upstream-mimalloc	23.434	-
large-objects	1	post-drain-rss-5s-bytes	mimalloc-pprof	23.453	-
large-objects	1	fragmentation-proxy	tcmalloc	1.1681184787564947	-
large-objects	1	fragmentation-proxy	jemalloc	1.93798828125	-
large-objects	1	fragmentation-proxy	upstream-mimalloc	0.8726819022933912	-
large-objects	1	fragmentation-proxy	mimalloc-pprof	0.782470703125	-
large-objects	2	sampled-peak-rss-bytes	tcmalloc	65.328	1.03x
large-objects	2	sampled-peak-rss-bytes	jemalloc	64.246	1.01x
large-objects	2	sampled-peak-rss-bytes	upstream-mimalloc	63.504	1.00x
large-objects	2	sampled-peak-rss-bytes	mimalloc-pprof	65.457	1.03x
large-objects	2	post-drain-rss-100ms-bytes	tcmalloc	49.328	-
large-objects	2	post-drain-rss-100ms-bytes	jemalloc	14.957	-
large-objects	2	post-drain-rss-100ms-bytes	upstream-mimalloc	63.504	-
large-objects	2	post-drain-rss-100ms-bytes	mimalloc-pprof	65.457	-
large-objects	2	post-drain-rss-1s-bytes	tcmalloc	49.328	-
large-objects	2	post-drain-rss-1s-bytes	jemalloc	14.957	-
large-objects	2	post-drain-rss-1s-bytes	upstream-mimalloc	63.504	-
large-objects	2	post-drain-rss-1s-bytes	mimalloc-pprof	65.457	-
large-objects	2	post-drain-rss-5s-bytes	tcmalloc	49.328	-
large-objects	2	post-drain-rss-5s-bytes	jemalloc	15.605	-
large-objects	2	post-drain-rss-5s-bytes	upstream-mimalloc	63.504	-
large-objects	2	post-drain-rss-5s-bytes	mimalloc-pprof	65.457	-
large-objects	2	fragmentation-proxy	tcmalloc	1.47412109375	-
large-objects	2	fragmentation-proxy	jemalloc	1.7601364311127514	-
large-objects	2	fragmentation-proxy	upstream-mimalloc	1.7037353515625	-
large-objects	2	fragmentation-proxy	mimalloc-pprof	1.7037353515625	-
sawtooth-retain-drain	1	sampled-peak-rss-bytes	tcmalloc	18.754	1.40x
sawtooth-retain-drain	1	sampled-peak-rss-bytes	jemalloc	9.266	0.69x
sawtooth-retain-drain	1	sampled-peak-rss-bytes	upstream-mimalloc	13.434	1.00x
sawtooth-retain-drain	1	sampled-peak-rss-bytes	mimalloc-pprof	13.453	1.00x
sawtooth-retain-drain	1	post-drain-rss-100ms-bytes	tcmalloc	18.754	-
sawtooth-retain-drain	1	post-drain-rss-100ms-bytes	jemalloc	8.285	-
sawtooth-retain-drain	1	post-drain-rss-100ms-bytes	upstream-mimalloc	13.312	-
sawtooth-retain-drain	1	post-drain-rss-100ms-bytes	mimalloc-pprof	13.137	-
sawtooth-retain-drain	1	post-drain-rss-1s-bytes	tcmalloc	18.754	-
sawtooth-retain-drain	1	post-drain-rss-1s-bytes	jemalloc	8.285	-
sawtooth-retain-drain	1	post-drain-rss-1s-bytes	upstream-mimalloc	13.312	-
sawtooth-retain-drain	1	post-drain-rss-1s-bytes	mimalloc-pprof	13.137	-
sawtooth-retain-drain	1	post-drain-rss-5s-bytes	tcmalloc	18.754	-
sawtooth-retain-drain	1	post-drain-rss-5s-bytes	jemalloc	8.285	-
sawtooth-retain-drain	1	post-drain-rss-5s-bytes	upstream-mimalloc	13.312	-
sawtooth-retain-drain	1	post-drain-rss-5s-bytes	mimalloc-pprof	13.137	-
sawtooth-retain-drain	1	fragmentation-proxy	tcmalloc	10.716312930715782	-
sawtooth-retain-drain	1	fragmentation-proxy	jemalloc	1.439381515754949	-
sawtooth-retain-drain	1	fragmentation-proxy	upstream-mimalloc	8.922841698632732	-
sawtooth-retain-drain	1	fragmentation-proxy	mimalloc-pprof	8.970786883684866	-
sawtooth-retain-drain	physical-core	sampled-peak-rss-bytes	tcmalloc	18.68	0.96x
sawtooth-retain-drain	physical-core	sampled-peak-rss-bytes	jemalloc	13.254	0.68x
sawtooth-retain-drain	physical-core	sampled-peak-rss-bytes	upstream-mimalloc	19.441	1.00x
sawtooth-retain-drain	physical-core	sampled-peak-rss-bytes	mimalloc-pprof	19.465	1.00x
sawtooth-retain-drain	physical-core	post-drain-rss-100ms-bytes	tcmalloc	18.68	-
sawtooth-retain-drain	physical-core	post-drain-rss-100ms-bytes	jemalloc	11.309	-
sawtooth-retain-drain	physical-core	post-drain-rss-100ms-bytes	upstream-mimalloc	13.316	-
sawtooth-retain-drain	physical-core	post-drain-rss-100ms-bytes	mimalloc-pprof	14.836	-
sawtooth-retain-drain	physical-core	post-drain-rss-1s-bytes	tcmalloc	18.68	-
sawtooth-retain-drain	physical-core	post-drain-rss-1s-bytes	jemalloc	11.309	-
sawtooth-retain-drain	physical-core	post-drain-rss-1s-bytes	upstream-mimalloc	13.316	-
sawtooth-retain-drain	physical-core	post-drain-rss-1s-bytes	mimalloc-pprof	14.836	-
sawtooth-retain-drain	physical-core	post-drain-rss-5s-bytes	tcmalloc	18.68	-
sawtooth-retain-drain	physical-core	post-drain-rss-5s-bytes	jemalloc	11.328	-
sawtooth-retain-drain	physical-core	post-drain-rss-5s-bytes	upstream-mimalloc	13.316	-
sawtooth-retain-drain	physical-core	post-drain-rss-5s-bytes	mimalloc-pprof	14.836	-
sawtooth-retain-drain	physical-core	fragmentation-proxy	tcmalloc	5.419650904494531	-
sawtooth-retain-drain	physical-core	fragmentation-proxy	jemalloc	1.360864821977586	-
sawtooth-retain-drain	physical-core	fragmentation-proxy	upstream-mimalloc	10.715987728290807	-
sawtooth-retain-drain	physical-core	fragmentation-proxy	mimalloc-pprof	11.279517789837067	-
small-log-mixed	physical-core	sampled-peak-rss-bytes	tcmalloc	18.426	1.95x
small-log-mixed	physical-core	sampled-peak-rss-bytes	jemalloc	13.281	1.41x
small-log-mixed	physical-core	sampled-peak-rss-bytes	upstream-mimalloc	9.441	1.00x
small-log-mixed	physical-core	sampled-peak-rss-bytes	mimalloc-pprof	9.461	1.00x
small-log-mixed	physical-core	post-drain-rss-100ms-bytes	tcmalloc	18.426	-
small-log-mixed	physical-core	post-drain-rss-100ms-bytes	jemalloc	13.141	-
small-log-mixed	physical-core	post-drain-rss-100ms-bytes	upstream-mimalloc	9.379	-
small-log-mixed	physical-core	post-drain-rss-100ms-bytes	mimalloc-pprof	9.398	-
small-log-mixed	physical-core	post-drain-rss-1s-bytes	tcmalloc	18.426	-
small-log-mixed	physical-core	post-drain-rss-1s-bytes	jemalloc	13.141	-
small-log-mixed	physical-core	post-drain-rss-1s-bytes	upstream-mimalloc	9.379	-
small-log-mixed	physical-core	post-drain-rss-1s-bytes	mimalloc-pprof	9.398	-
small-log-mixed	physical-core	post-drain-rss-5s-bytes	tcmalloc	18.426	-
small-log-mixed	physical-core	post-drain-rss-5s-bytes	jemalloc	13.141	-
small-log-mixed	physical-core	post-drain-rss-5s-bytes	upstream-mimalloc	9.379	-
small-log-mixed	physical-core	post-drain-rss-5s-bytes	mimalloc-pprof	9.398	-
small-log-mixed	physical-core	fragmentation-proxy	tcmalloc	5773.879518072289	-
small-log-mixed	physical-core	fragmentation-proxy	jemalloc	108.98447893569845	-
small-log-mixed	physical-core	fragmentation-proxy	upstream-mimalloc	4540.144578313253	-
small-log-mixed	physical-core	fragmentation-proxy	mimalloc-pprof	1198.8292682926829	-
cross-thread-producer-consumer	physical-core	sampled-peak-rss-bytes	tcmalloc	18.0	1.91x
cross-thread-producer-consumer	physical-core	sampled-peak-rss-bytes	jemalloc	13.266	1.41x
cross-thread-producer-consumer	physical-core	sampled-peak-rss-bytes	upstream-mimalloc	9.441	1.00x
cross-thread-producer-consumer	physical-core	sampled-peak-rss-bytes	mimalloc-pprof	9.461	1.00x
cross-thread-producer-consumer	physical-core	post-drain-rss-100ms-bytes	tcmalloc	18.0	-
cross-thread-producer-consumer	physical-core	post-drain-rss-100ms-bytes	jemalloc	13.133	-
cross-thread-producer-consumer	physical-core	post-drain-rss-100ms-bytes	upstream-mimalloc	8.941	-
cross-thread-producer-consumer	physical-core	post-drain-rss-100ms-bytes	mimalloc-pprof	9.023	-
cross-thread-producer-consumer	physical-core	post-drain-rss-1s-bytes	tcmalloc	18.0	-
cross-thread-producer-consumer	physical-core	post-drain-rss-1s-bytes	jemalloc	13.133	-
cross-thread-producer-consumer	physical-core	post-drain-rss-1s-bytes	upstream-mimalloc	8.941	-
cross-thread-producer-consumer	physical-core	post-drain-rss-1s-bytes	mimalloc-pprof	9.023	-
cross-thread-producer-consumer	physical-core	post-drain-rss-5s-bytes	tcmalloc	18.0	-
cross-thread-producer-consumer	physical-core	post-drain-rss-5s-bytes	jemalloc	13.133	-
cross-thread-producer-consumer	physical-core	post-drain-rss-5s-bytes	upstream-mimalloc	8.988	-
cross-thread-producer-consumer	physical-core	post-drain-rss-5s-bytes	mimalloc-pprof	9.023	-
cross-thread-producer-consumer	physical-core	fragmentation-proxy	tcmalloc	7347.975757575758	-
cross-thread-producer-consumer	physical-core	fragmentation-proxy	jemalloc	143.71929824561403	-
cross-thread-producer-consumer	physical-core	fragmentation-proxy	upstream-mimalloc	4501.40614334471	-
cross-thread-producer-consumer	physical-core	fragmentation-proxy	mimalloc-pprof	1883.8745644599303	-
thread-churn	physical-core	sampled-peak-rss-bytes	tcmalloc	18.395	1.95x
thread-churn	physical-core	sampled-peak-rss-bytes	jemalloc	13.203	1.40x
thread-churn	physical-core	sampled-peak-rss-bytes	upstream-mimalloc	9.441	1.00x
thread-churn	physical-core	sampled-peak-rss-bytes	mimalloc-pprof	11.465	1.21x
thread-churn	physical-core	post-drain-rss-100ms-bytes	tcmalloc	18.395	-
thread-churn	physical-core	post-drain-rss-100ms-bytes	jemalloc	13.141	-
thread-churn	physical-core	post-drain-rss-100ms-bytes	upstream-mimalloc	9.441	-
thread-churn	physical-core	post-drain-rss-100ms-bytes	mimalloc-pprof	11.465	-
thread-churn	physical-core	post-drain-rss-1s-bytes	tcmalloc	18.395	-
thread-churn	physical-core	post-drain-rss-1s-bytes	jemalloc	13.141	-
thread-churn	physical-core	post-drain-rss-1s-bytes	upstream-mimalloc	9.441	-
thread-churn	physical-core	post-drain-rss-1s-bytes	mimalloc-pprof	11.465	-
thread-churn	physical-core	post-drain-rss-5s-bytes	tcmalloc	18.395	-
thread-churn	physical-core	post-drain-rss-5s-bytes	jemalloc	13.141	-
thread-churn	physical-core	post-drain-rss-5s-bytes	upstream-mimalloc	9.441	-
thread-churn	physical-core	post-drain-rss-5s-bytes	mimalloc-pprof	11.465	-
thread-churn	physical-core	fragmentation-proxy	tcmalloc	3252.0	-
thread-churn	physical-core	fragmentation-proxy	jemalloc	3994.7680608365017	-
thread-churn	physical-core	fragmentation-proxy	upstream-mimalloc	521.3809064609451	-
thread-churn	physical-core	fragmentation-proxy	mimalloc-pprof	2576.0	-

Paired effects

Scenario	Candidate	Effect	95% interval	Interpretation
tiny-fixed-16	tcmalloc	0.9030887170615924	0.8930968989717047–0.9047697006846397	informational
tiny-fixed-16	jemalloc	0.9954456849888002	0.9887828197792768–1.0101214168385761	informational
tiny-fixed-16	mimalloc-pprof	0.9636222989825978	0.9551443676114272–0.9746200957766517	informational
tiny-fixed-16	tcmalloc	0.5285438867470332	0.5039708763646052–0.5551617383014064	informational
tiny-fixed-16	jemalloc	1.0782542909121315	1.0474184980354644–1.1186760086638905	informational
tiny-fixed-16	mimalloc-pprof	1.0987350988101816	1.063577139769508–1.1070780889419916	informational
tiny-fixed-64	tcmalloc	0.9596926666943203	0.9455925488879267–0.9633058239487665	informational
tiny-fixed-64	jemalloc	0.998184636368679	0.9764090184514478–1.002794711406887	informational
tiny-fixed-64	mimalloc-pprof	0.9882870535028627	0.9787136277946561–0.9929431141583664	informational
tiny-fixed-64	tcmalloc	0.6360140369493719	0.6130085353036214–0.6953605458219186	informational
tiny-fixed-64	jemalloc	0.9690052979831267	0.8909252906690394–0.9834023574950098	informational
tiny-fixed-64	mimalloc-pprof	0.9381929778923501	0.890870217100541–0.9643381542092824	informational
small-log-mixed	tcmalloc	0.9502250714630666	0.9254394871726186–0.9725885551122073	informational
small-log-mixed	jemalloc	0.9907004107106753	0.987517917501249–0.9989920040509755	informational
small-log-mixed	mimalloc-pprof	0.9823211271266745	0.96520216690798–0.995161700534044	informational
small-log-mixed	tcmalloc	0.702518233295054	0.6074092523932313–0.7658064118309663	informational
small-log-mixed	jemalloc	1.0187793147582607	1.0000080199634513–1.0760233834058486	informational
small-log-mixed	mimalloc-pprof	1.016641643465195	1.0010222283117718–1.0406803596661056	informational
small-log-mixed	tcmalloc	0.8232100564848546	0.7857052704539349–0.8481600403772473	informational
small-log-mixed	jemalloc	0.9876126720855736	0.9732710665351015–1.0263997584973426	informational
small-log-mixed	mimalloc-pprof	0.9809238744423461	0.9602586889513448–1.0044935076252712	informational
medium-log-mixed	tcmalloc	0.9919418810668833	0.9897772293048814–1.0161843161694672	informational
medium-log-mixed	jemalloc	1.005620092995609	0.9983119979711228–1.016963042949492	informational
medium-log-mixed	mimalloc-pprof	0.9952572837050135	0.9887584299610721–1.0115231161659337	informational
medium-log-mixed	tcmalloc	0.9956164196939575	0.986342700630473–1.013622754813016	informational
medium-log-mixed	jemalloc	1.0077587903209309	1.0055610101968535–1.0240617157531555	informational
medium-log-mixed	mimalloc-pprof	1.0008056260610094	0.9803980339890392–1.0119237512211516	informational
large-objects	tcmalloc	1.007046062658171	0.9891472720491264–1.019184856548752	informational
large-objects	jemalloc	0.7082085488000776	0.6715452147627282–0.7744908771281684	informational
large-objects	mimalloc-pprof	1.0123698855352277	0.9904277348864811–1.0163509155452202	informational
large-objects	tcmalloc	0.9584470698594721	0.9495304306899814–0.9860031691846163	informational
large-objects	jemalloc	0.703088426500278	0.6706112108743713–0.7211403089868699	informational
large-objects	mimalloc-pprof	1.003941128144639	0.9953846503972754–1.0292322687341733	informational
batch-lifo	tcmalloc	0.98230531391378	0.9755361936834633–1.0092149579729597	informational
batch-lifo	jemalloc	1.0013234812930671	0.9886317943448607–1.0086963779685878	informational
batch-lifo	mimalloc-pprof	0.9973263514684478	0.9703623710859727–1.000516168847064	informational
batch-lifo	tcmalloc	0.9769642863998627	0.9568430379311988–0.9895277900792637	informational
batch-lifo	jemalloc	1.0515756283706559	1.031245854376035–1.056646968818429	informational
batch-lifo	mimalloc-pprof	1.0004751465378534	0.9837673543252913–1.013525393408476	informational
batch-fifo	tcmalloc	0.9865912456771827	0.9811555018505701–0.9998273113671473	informational
batch-fifo	jemalloc	1.0045723714853594	0.9923110038123303–1.0077151652043717	informational
batch-fifo	mimalloc-pprof	0.9935725976782257	0.9805185047929657–1.0043885921118425	informational
batch-fifo	tcmalloc	0.9731545029114423	0.9694366396932894–0.9784821050265087	informational
batch-fifo	jemalloc	1.040794878651713	1.0359062971993804–1.0587902811894532	informational
batch-fifo	mimalloc-pprof	0.9971284895735845	0.9591183520279214–1.0106066820296624	informational
cross-thread-producer-consumer	tcmalloc	1.0695638098091445	0.973908589841669–1.1813637984696945	informational
cross-thread-producer-consumer	jemalloc	0.9903123400835215	0.9362293698933357–1.1073726504971628	informational
cross-thread-producer-consumer	mimalloc-pprof	1.0152903373528825	0.9326214773541159–1.1177837937368593	informational
cross-thread-producer-consumer	tcmalloc	1.007669826726571	0.9670280510694202–1.0361508887403543	informational
cross-thread-producer-consumer	jemalloc	0.9960112528245797	0.9171096834414628–1.1624911737702857	informational
cross-thread-producer-consumer	mimalloc-pprof	0.9616224117401858	0.8974434656394306–1.1490243251434666	informational
random-ownership	tcmalloc	1.0102391186030297	0.968275829602271–1.0763920025023574	informational
random-ownership	jemalloc	1.033823055898988	0.9492426252668607–1.1313941261794738	informational
random-ownership	mimalloc-pprof	0.9930720226560547	0.9121237394518948–1.0560229870657092	informational
realloc-geometric	tcmalloc	0.9970044275765616	0.9859024678062078–1.0054271783906987	informational
realloc-geometric	jemalloc	1.0053983088506662	1.0027142323667826–1.0106034865220657	informational
realloc-geometric	mimalloc-pprof	0.9959815103437835	0.9890049129388689–1.0179295856764212	informational
realloc-geometric	tcmalloc	0.9372982493909862	0.916745056367889–0.9687995337233701	informational
realloc-geometric	jemalloc	1.0218807509210397	1.008610319130032–1.0297472563351724	informational
realloc-geometric	mimalloc-pprof	1.0024994925492294	0.9871276403137452–1.005106542137425	informational
calloc-zero	tcmalloc	1.0001164485419014	0.9830110400841736–1.010227104259033	informational
calloc-zero	jemalloc	0.9963849034725719	0.9875274661650897–1.0039132103483248	informational
calloc-zero	mimalloc-pprof	0.9977285713289421	0.9633740208260281–1.0102013392926936	informational
calloc-zero	tcmalloc	0.9339000743993526	0.9237232629892314–0.9384917473837444	informational
calloc-zero	jemalloc	1.0190893070134248	1.0107149615182018–1.0266341289370886	informational
calloc-zero	mimalloc-pprof	1.002497562156417	0.9982389329235084–1.0098281415453605	informational
aligned-range	tcmalloc	1.0054681346932421	1.000477309157981–1.011010742503774	informational
aligned-range	jemalloc	1.0089661187114547	1.003382554278514–1.012979360247045	informational
aligned-range	mimalloc-pprof	0.9973105157956598	0.9933513150774299–1.000065009789826	informational
aligned-range	tcmalloc	0.9835865376331826	0.9695204759778474–0.9950221796419262	informational
aligned-range	jemalloc	1.0284683265026153	1.0180418609365267–1.0470541977066763	informational
aligned-range	mimalloc-pprof	0.9978817712284787	0.9934492118647295–1.0200159081518656	informational
sawtooth-retain-drain	tcmalloc	1.0044105427212455	0.9939037401635837–1.0174648811046707	informational
sawtooth-retain-drain	jemalloc	1.003998373243252	0.9842881816280348–1.0087510133212942	informational
sawtooth-retain-drain	mimalloc-pprof	1.0007071169028103	0.985920066410255–1.0267480250699812	informational
sawtooth-retain-drain	tcmalloc	1.0038369641009053	0.9784583876624606–1.0126052827874317	informational
sawtooth-retain-drain	jemalloc	1.0060193425042097	0.9926494409199608–1.0178297411813062	informational
sawtooth-retain-drain	mimalloc-pprof	0.9933383412686818	0.9835573332761899–1.021828604822189	informational
thread-churn	tcmalloc	1.0777848988752878	1.0705677372220506–1.0887861464994801	informational
thread-churn	jemalloc	0.7688444793828586	0.7626091166397961–0.7764264341698518	informational
thread-churn	mimalloc-pprof	0.9934040245150402	0.9789187397138889–1.0058087976259786	informational
thread-churn	tcmalloc	1.0751073945178202	1.0188320795111714–1.1378031088615344	informational
thread-churn	jemalloc	0.7963691121274485	0.7697318085759609–0.8122693313522719	informational
thread-churn	mimalloc-pprof	1.0116898269545882	0.940021249270361–1.0353399264976078	informational
representative-mix	tcmalloc	0.9953105325944405	0.9831201913728964–1.006144747283409	informational
representative-mix	jemalloc	0.9946245178045479	0.9868652246967007–1.0220852847733792	informational
representative-mix	mimalloc-pprof	0.9966079654716755	0.9888406755892577–1.003144507375463	informational
representative-mix	tcmalloc	1.0079599077561547	0.9859617393433742–1.0110526608251935	informational
representative-mix	jemalloc	1.0176130884977337	1.0121230932842007–1.0276237461090252	informational
representative-mix	mimalloc-pprof	0.9963862762387646	0.9852255112968029–1.0276330251969974	informational

Compatible history

History connected only across the selected identical comparison key

Thread scaling (sparse sweep)

Aggregate throughput by worker count for the Tiny hot path (16-64 B) pattern, one line per allocator

Aggregate throughput by worker count for the General mix (8 B-4 KiB, with realloc) pattern, one line per allocator

Aggregate throughput by worker count for the Large buffers (64 KiB-4 MiB, page-touched) pattern, one line per allocator

Aggregate throughput by worker count for the Cross-thread handoff (16-512 B, remote free) pattern, one line per allocator

coverage mode - reduced statistical rigor (3 blocks). These panels trade statistical rigor for thread coverage: 3 blocks per cell, median with min/max, and deliberately no confidence intervals or noise gating. Do not read them as headline-grade numbers.

Worker counts are literal 1, 2, 3, 4, 6, 8; the runner allows 4 logical CPUs, so higher points are oversubscribed and describe contention rather than core scaling. splitmix64 chain over (run seed, pattern tag, thread count, block, worker); the allocator is deliberately absent so all four allocators replay one stream. Scaling run 32626734827/1 measured mimalloc-pprof at source 6fcb196697210e6d6b42d88e4435ace5ab0a4172, which is not necessarily the commit above; metric key 39ce7d68a2bf515e9302b6655530d53b1e62c3c720b30d999ac09d6e409dedb5.

Pattern	Workers	Allocator	Median ops/s	Min - max	Speedup vs 1	Oversubscribed
sparse-cross-thread	1	jemalloc	30436430.4	27862998.4 - 30471458.1	1.0x	no
sparse-cross-thread	1	mimalloc-pprof	26746423.5	26661750.2 - 26859420.3	1.0x	no
sparse-cross-thread	1	tcmalloc	23634270.4	23621200.1 - 23706514.9	1.0x	no
sparse-cross-thread	1	upstream-mimalloc	29496893.2	29330741.1 - 29642108.4	1.0x	no
sparse-cross-thread	2	jemalloc	11114599.5	10997185.5 - 11247095.4	0.37x	no
sparse-cross-thread	2	mimalloc-pprof	9907113.5	9869822.8 - 10401982.1	0.37x	no
sparse-cross-thread	2	tcmalloc	10471148.2	10306815.4 - 10613875.5	0.44x	no
sparse-cross-thread	2	upstream-mimalloc	9618928.5	9595201.5 - 9899312.3	0.33x	no
sparse-cross-thread	3	jemalloc	14653130.4	14548646.7 - 15019531.1	0.48x	no
sparse-cross-thread	3	mimalloc-pprof	13599934.9	13361294.0 - 13629957.9	0.51x	no
sparse-cross-thread	3	tcmalloc	14007628.6	13881667.7 - 14344264.0	0.59x	no
sparse-cross-thread	3	upstream-mimalloc	13560472.2	13179077.8 - 13735903.6	0.46x	no
sparse-cross-thread	4	jemalloc	16861307.7	16740811.0 - 17410175.4	0.55x	no
sparse-cross-thread	4	mimalloc-pprof	15014683.2	14979461.3 - 15268268.9	0.56x	no
sparse-cross-thread	4	tcmalloc	15472026.8	15363217.8 - 15627608.3	0.65x	no
sparse-cross-thread	4	upstream-mimalloc	14830892.5	14821445.7 - 14869045.6	0.5x	no
sparse-cross-thread	6	jemalloc	23261410.6	23152861.5 - 23445112.0	0.76x	yes
sparse-cross-thread	6	mimalloc-pprof	21957913.1	21671595.6 - 22366076.8	0.82x	yes
sparse-cross-thread	6	tcmalloc	23246302.6	23167891.0 - 23349398.2	0.98x	yes
sparse-cross-thread	6	upstream-mimalloc	22028394.5	21652853.4 - 22334512.7	0.75x	yes
sparse-cross-thread	8	jemalloc	29902956.8	28743018.9 - 29917194.3	0.98x	yes
sparse-cross-thread	8	mimalloc-pprof	26806579.4	26782440.8 - 26888154.6	1.0x	yes
sparse-cross-thread	8	tcmalloc	27974196.0	26780388.1 - 27992418.4	1.18x	yes
sparse-cross-thread	8	upstream-mimalloc	26883659.4	26569023.5 - 27065438.1	0.91x	yes
sparse-large-buffers	1	jemalloc	538612.5	500788.4 - 608775.0	1.0x	no
sparse-large-buffers	1	mimalloc-pprof	694818.0	693449.0 - 699905.0	1.0x	no
sparse-large-buffers	1	tcmalloc	690072.7	680885.4 - 697991.8	1.0x	no
sparse-large-buffers	1	upstream-mimalloc	702520.0	695718.1 - 702934.3	1.0x	no
sparse-large-buffers	2	jemalloc	871545.0	847776.0 - 922374.3	1.62x	no
sparse-large-buffers	2	mimalloc-pprof	1349308.1	1347272.8 - 1361270.0	1.94x	no
sparse-large-buffers	2	tcmalloc	1234024.1	1223496.0 - 1234077.8	1.79x	no
sparse-large-buffers	2	upstream-mimalloc	1350491.4	1346699.6 - 1361852.3	1.92x	no
sparse-large-buffers	3	jemalloc	1000012.9	978044.5 - 1028519.2	1.86x	no
sparse-large-buffers	3	mimalloc-pprof	1559515.4	1556605.3 - 1574396.4	2.24x	no
sparse-large-buffers	3	tcmalloc	1403086.6	1381760.5 - 1406859.2	2.03x	no
sparse-large-buffers	3	upstream-mimalloc	1581883.7	1568246.7 - 1591734.7	2.25x	no
sparse-large-buffers	4	jemalloc	1113930.5	1073169.4 - 1121675.9	2.07x	no
sparse-large-buffers	4	mimalloc-pprof	1895058.3	1886583.1 - 1896980.2	2.73x	no
sparse-large-buffers	4	tcmalloc	1505435.3	1452138.8 - 1505756.3	2.18x	no
sparse-large-buffers	4	upstream-mimalloc	1900204.6	1809527.2 - 1906747.4	2.7x	no
sparse-large-buffers	6	jemalloc	1068113.0	1045727.6 - 1088838.5	1.98x	yes
sparse-large-buffers	6	mimalloc-pprof	1845034.6	1818667.5 - 1889079.5	2.66x	yes
sparse-large-buffers	6	tcmalloc	1488680.0	1421900.3 - 1501909.7	2.16x	yes
sparse-large-buffers	6	upstream-mimalloc	1831800.8	1813107.0 - 1844735.1	2.61x	yes
sparse-large-buffers	8	jemalloc	1020749.4	1003588.2 - 1038898.5	1.9x	yes
sparse-large-buffers	8	mimalloc-pprof	1852099.9	1839306.1 - 1858712.6	2.67x	yes
sparse-large-buffers	8	tcmalloc	1463922.0	1463690.4 - 1484937.9	2.12x	yes
sparse-large-buffers	8	upstream-mimalloc	1844313.4	1817689.1 - 1846010.5	2.63x	yes
sparse-mixed-general	1	jemalloc	20759573.0	20734242.6 - 20926728.0	1.0x	no
sparse-mixed-general	1	mimalloc-pprof	18764095.8	18116690.5 - 18881222.5	1.0x	no
sparse-mixed-general	1	tcmalloc	18123954.0	18071708.0 - 18161144.3	1.0x	no
sparse-mixed-general	1	upstream-mimalloc	20490853.8	20230848.7 - 20526615.9	1.0x	no
sparse-mixed-general	2	jemalloc	41434417.8	40317913.4 - 41529241.7	2.0x	no
sparse-mixed-general	2	mimalloc-pprof	36567355.4	36529966.0 - 36980117.2	1.95x	no
sparse-mixed-general	2	tcmalloc	34294522.6	34101942.7 - 35075169.5	1.89x	no
sparse-mixed-general	2	upstream-mimalloc	38919533.8	38912724.8 - 39806756.1	1.9x	no
sparse-mixed-general	3	jemalloc	45264119.0	45250787.0 - 46330036.9	2.18x	no
sparse-mixed-general	3	mimalloc-pprof	40960394.2	40923290.8 - 41322620.1	2.18x	no
sparse-mixed-general	3	tcmalloc	38699756.4	38610402.1 - 38718433.1	2.14x	no
sparse-mixed-general	3	upstream-mimalloc	44788564.0	44760835.9 - 45156161.2	2.19x	no
sparse-mixed-general	4	jemalloc	53703972.4	53208171.8 - 54050839.8	2.59x	no
sparse-mixed-general	4	mimalloc-pprof	47581679.4	47442135.3 - 48127967.9	2.54x	no
sparse-mixed-general	4	tcmalloc	43947165.4	43570578.9 - 44869580.3	2.42x	no
sparse-mixed-general	4	upstream-mimalloc	52685463.4	52601633.4 - 53114666.2	2.57x	no
sparse-mixed-general	6	jemalloc	52465215.7	52305343.6 - 54043466.3	2.53x	yes
sparse-mixed-general	6	mimalloc-pprof	48029686.6	45812945.7 - 48229605.7	2.56x	yes
sparse-mixed-general	6	tcmalloc	44452075.6	42740251.8 - 44584717.3	2.45x	yes
sparse-mixed-general	6	upstream-mimalloc	53332286.7	52981225.0 - 53604760.4	2.6x	yes
sparse-mixed-general	8	jemalloc	51927422.7	51813986.9 - 53080009.6	2.5x	yes
sparse-mixed-general	8	mimalloc-pprof	47198365.6	46654191.8 - 47550401.1	2.52x	yes
sparse-mixed-general	8	tcmalloc	44672036.6	43713781.6 - 45228472.9	2.46x	yes
sparse-mixed-general	8	upstream-mimalloc	52803174.4	52092781.2 - 52921145.9	2.58x	yes
sparse-tiny-hot	1	jemalloc	26031022.2	26022233.0 - 26221203.8	1.0x	no
sparse-tiny-hot	1	mimalloc-pprof	24374801.2	24367962.1 - 24393986.5	1.0x	no
sparse-tiny-hot	1	tcmalloc	22022591.7	21953254.8 - 22076038.4	1.0x	no
sparse-tiny-hot	1	upstream-mimalloc	27053829.3	26729172.8 - 27099351.7	1.0x	no
sparse-tiny-hot	2	jemalloc	52045346.5	51639964.4 - 52332286.8	2.0x	no
sparse-tiny-hot	2	mimalloc-pprof	46783276.3	46631621.5 - 47830488.6	1.92x	no
sparse-tiny-hot	2	tcmalloc	42102551.7	42020974.2 - 42528301.2	1.91x	no
sparse-tiny-hot	2	upstream-mimalloc	52177840.4	51314694.9 - 52500551.0	1.93x	no
sparse-tiny-hot	3	jemalloc	58794409.5	58689910.1 - 58890038.0	2.26x	no
sparse-tiny-hot	3	mimalloc-pprof	52276888.0	51037084.3 - 52663675.4	2.14x	no
sparse-tiny-hot	3	tcmalloc	46718373.4	46679534.8 - 46835406.6	2.12x	no
sparse-tiny-hot	3	upstream-mimalloc	58001766.9	57969650.6 - 59444442.2	2.14x	no
sparse-tiny-hot	4	jemalloc	69375009.6	69095182.4 - 69570349.2	2.67x	no
sparse-tiny-hot	4	mimalloc-pprof	60623030.8	57247155.6 - 61218428.7	2.49x	no
sparse-tiny-hot	4	tcmalloc	53606584.4	53445529.3 - 53808459.2	2.43x	no
sparse-tiny-hot	4	upstream-mimalloc	68608065.2	67994531.7 - 69274874.9	2.54x	no
sparse-tiny-hot	6	jemalloc	67942249.5	64481630.7 - 68703407.2	2.61x	yes
sparse-tiny-hot	6	mimalloc-pprof	61701294.2	60732259.8 - 61704795.6	2.53x	yes
sparse-tiny-hot	6	tcmalloc	53370622.5	52934254.5 - 53978684.0	2.42x	yes
sparse-tiny-hot	6	upstream-mimalloc	68543872.3	66372121.7 - 68973828.3	2.53x	yes
sparse-tiny-hot	8	jemalloc	69172084.2	68673115.9 - 69422227.6	2.66x	yes
sparse-tiny-hot	8	mimalloc-pprof	60687024.4	59942288.9 - 61213361.1	2.49x	yes
sparse-tiny-hot	8	tcmalloc	52146760.4	51095244.2 - 54486785.2	2.37x	yes
sparse-tiny-hot	8	upstream-mimalloc	69002145.0	68292957.4 - 70116610.1	2.55x	yes

Pending Phase 6 panels

latency: pending

pending - metric protocol not implemented

Phase issue

pprof-tax: pending

pending - metric protocol not implemented

Phase issue

Pending panels contain no measured values.

Provenance

Run 32355854197, attempt 1; target x86_64-unknown-linux-gnu; fingerprint bd0a6a8c4929b3da17a6bd14a1a5ae6205034e9f3ceb259544b1e1c1adb05b70.

Allocator	Source	Binary
tcmalloc	`c316de3ee8ffb5aff6547aa10151bc8dda3a2942`	`4e28031aa48ff732d220702a9ca32f4da4ca3c6a0a39a10054fbffb38cb2bbfe`
jemalloc	`81034ce1f1373e37dc865038e1bc8eeecf559ce8`	`e5705c6014b27d8134063eb7f19428110dbd4eefe0ba04d06ef64df21a3ba1f8`
upstream-mimalloc	`bcee5a88e9311c08b8f93fbce3dcafe2f22a2d26`	`dc09025a480c5a20255a6d377fb381eb1d545301de6200f1fad11c5d8b2ba8f0`
mimalloc-pprof	`68ccee0e47bbb4052d2827556ff6db175b740743`	`9df4cacb34c4ae4a54f4da50600e64ad12465a6ec168a94375097a0ae36dd50b`

Actions run

Methodology

{"absolute_summary": "median, Type-7 quartiles, IQR, min/max; no outlier removal", "confidence_interval": "deterministic 95% percentile whole-block bootstrap, 10000 resamples", "informational": true, "noise_threshold_relative_iqr": 0.1, "paired_effect": "exp(median(per-block log(candidate/reference)))", "quantile_method": "R/NumPy Type 7 linear interpolation"}

Reproduce

MIMALLOC_PROF=0 MIMALLOC_MEMORY_EVENTS=0 '/home/runner/work/mimalloc-pprof/mimalloc-pprof/rust/target/release/children/tcmalloc/benchmark-child' < '/home/runner/work/_temp/benchmark-output-32355854197/requests/tiny-fixed-16-1-block-0000-ordinal-0-tcmalloc.json'