home: minimal

[isabelroses]

No description provided.

[github-actions]

Nix Eval Stats: amaterasu

Metric	Before (mean ± σ)	After (mean ± σ)	Δ	%
cpuTime	18.686 ± 0.206	18.735 ± 0.240	+0.050	+0.3%
envs.bytes	273,738,624 ± 0.000	270,919,112 ± 0.000	-2,819,512	-1.0%
envs.elements	20,474,284 ± 0.000	20,277,996 ± 0.000	-196,288	-1.0%
envs.number	13,743,044 ± 0.000	13,586,893 ± 0.000	-156,151	-1.1%
gc.heapSize	1,292,107,776 ± 0.000	1,325,662,208 ± 0.000	+33,554,432	+2.6%
gc.totalBytes	2,161,727,488 ± 7334.905	2,149,231,024 ± 3885.036	-12,496,464	-0.6%
list.bytes	34,986,008 ± 0.000	34,587,712 ± 0.000	-398,296	-1.1%
list.concats	645,054 ± 0.000	643,179 ± 0.000	-1,875	-0.3%
list.elements	4,373,251 ± 0.000	4,323,464 ± 0.000	-49,787	-1.1%
nrAvoided	15,697,987 ± 0.000	15,556,355 ± 0.000	-141,632	-0.9%
nrFunctionCalls	11,910,544 ± 0.000	11,775,004 ± 0.000	-135,540	-1.1%
nrLookups	7,848,826 ± 0.000	7,758,948 ± 0.000	-89,878	-1.1%
nrOpUpdateValuesCopied	45,738,376 ± 0.000	45,698,071 ± 0.000	-40,305	-0.1%
nrOpUpdates	1,122,983 ± 0.000	1,117,681 ± 0.000	-5,302	-0.5%
nrPrimOpCalls	6,638,158 ± 0.000	6,571,001 ± 0.000	-67,157	-1.0%
nrThunks	19,399,464 ± 0.000	19,225,891 ± 0.000	-173,573	-0.9%
sets.bytes	1,045,167,072 ± 0.000	1,042,371,968 ± 0.000	-2,795,104	-0.3%
sets.elements	63,432,076 ± 0.000	63,280,009 ± 0.000	-152,067	-0.2%
sets.number	3,781,732 ± 0.000	3,736,478 ± 0.000	-45,254	-1.2%
sizes.Attr	16 ± 0.000	16 ± 0.000	0	+0.0%
sizes.Bindings	8 ± 0.000	8 ± 0.000	0	+0.0%
sizes.Env	8 ± 0.000	8 ± 0.000	0	+0.0%
sizes.Value	8 ± 0.000	8 ± 0.000	0	+0.0%
symbols.bytes	1,352,301 ± 0.000	1,311,241 ± 0.000	-41,060	-3.0%
symbols.number	113,285 ± 0.000	110,075 ± 0.000	-3,210	-2.8%
values.bytes	0 ± 0.000	0 ± 0.000	0	N/A
values.number	0 ± 0.000	0 ± 0.000	0	N/A

[isabelroses]

can't seem to reproduce the eval speed improvments that CI seems to get

[github-actions]

Nix Eval Stats

Paired comparison across 7 host(s). Metrics with identical values across all hosts are listed under Unchanged; the rest get a paired t-test (p-value, t-stat).

Unchanged values

metric	value
sizes.Attr1	16
sizes.Bindings2	8
sizes.Env3	8
sizes.Value4	8

Updated values

metric	mean_before	mean_after	mean_diff	mean_pct_change	p_value	t_stat
time.cpu5	9.4963	1.3532	-8.1431	-80.2801	0.0027	-4.9012
time.gc6	0.6611	0.0656	-0.5956	-85.5196	0.0024	-5.0427
time.gcFraction7	0.0701	0.0156	-0.0545	-78.8442	0.0011	-5.8333
gc.cycles8	4.7143	1.4286	-3.2857	-67.6190	0.0016	-5.4212
gc.heapSize9	851106669.7143	424486034.2857	-426620635.4286	-46.5816	0.0026	-4.9425
gc.totalBytes10	1220735684.5714	233962338.2857	-986773346.2857	-76.2836	0.0017	-5.3515
envs.bytes11	150466212.5714	27584025.1429	-122882187.4286	-77.8200	0.0015	-5.4957
list.bytes12	18794413.7143	4145398.8571	-14649014.8571	-74.0669	0.0017	-5.4084
sets.bytes13	591839682.2857	114775105.1429	-477064577.1429	-75.6276	0.0019	-5.2616
symbols.bytes14	1207822.1429	714781.1429	-493041.0000	-40.0523	0.0010	-5.9126
values.bytes15	9201305.1429	1367877.7143	-7833427.4286	-80.6484	0.0018	-5.3337
envs.number16	7383599.7143	1430812.2857	-5952787.4286	-77.0344	0.0014	-5.5553
nrAvoided17	8424434.2857	1466720.2857	-6957714.0000	-78.4215	0.0017	-5.4005
nrExprs18	5316104.4286	2407666.8571	-2908437.5714	-53.3307	0.0010	-5.9101
nrFunctionCalls19	6245690.4286	1222862.8571	-5022827.5714	-76.8359	0.0014	-5.5522
nrLookups20	4022373.1429	718206.7143	-3304166.4286	-78.6433	0.0014	-5.5994
nrOpUpdateValuesCopied21	25027512.0000	4910217.4286	-20117294.5714	-75.1862	0.0020	-5.2116
nrOpUpdates22	633585.4286	78400.8571	-555184.5714	-82.7765	0.0020	-5.2082
nrPrimOpCalls23	2958545.1429	601766.7143	-2356778.4286	-76.1707	0.0014	-5.5577
nrThunks24	10069038.4286	1857532.4286	-8211506.0000	-77.7030	0.0015	-5.5289
sets.number25	2380993.4286	466092.7143	-1914900.7143	-76.5435	0.0016	-5.4584
symbols.number26	99656.0000	61630.4286	-38025.5714	-37.5388	0.0010	-5.9374
values.number27	1150163.1429	170984.7143	-979178.4286	-80.6484	0.0018	-5.3337
envs.elements28	11424676.8571	2017190.8571	-9407486.0000	-78.3269	0.0016	-5.4559
list.concats29	358277.2857	42652.4286	-315624.8571	-82.8170	0.0021	-5.1659
list.elements30	2349301.7143	518174.8571	-1831126.8571	-74.0669	0.0017	-5.4084
sets.elements31	35799483.4286	6940397.7143	-28859085.7143	-75.5959	0.0019	-5.2530

Footnotes

1. Size in bytes of the Attr type. ↩

2. Size in bytes of the Bindings type. ↩

3. Size in bytes of the Env type. ↩

4. Size in bytes of the Value type. ↩

5. Number of seconds of CPU time accounted by the OS to the Nix evaluator process. On UNIX systems, this comes from getrusage(RUSAGE_SELF). ↩

6. Number of seconds of CPU time accounted by the Boehm garbage collector to performing GC. ↩

7. What fraction of the total CPU time is accounted towards performing GC. ↩

8. Number of times garbage collection has been performed. ↩

9. Size in bytes of the garbage collector heap. ↩

10. Size in bytes of all allocations in the garbage collector. ↩

11. Size in bytes of all Env objects allocated by the Nix evaluator. ↩

12. Size in bytes of all lists allocated by the Nix evaluator. ↩

13. Size in bytes of all attrsets allocated by the Nix evaluator. ↩

14. Size in bytes of all items in the Nix evaluator symbol table. ↩

15. Size in bytes of all values allocated by the Nix evaluator. ↩

16. The count of all Env objects allocated. ↩

17. The number of thunks avoided being created. ↩

18. The number of expression objects ever created. ↩

19. The number of function calls ever made. ↩

20. The number of lookups into an attrset ever made. ↩

21. The number of attrset values copied in the process of merging attrsets. ↩

22. The number of attrset merge operations (//) performed. ↩

23. The number of function calls to primops (Nix builtins) ever made. ↩

24. The number of thunks ever made. ↩

25. The number of attrsets ever made. ↩

26. The number of symbols ever added to the symbol table. ↩

27. The number of values ever made. ↩

28. The number of values contained within an Env object. ↩

29. The number of list concatenation operations (++) performed. ↩

30. The number of values contained within a list. ↩

31. The number of values contained within an attrset. ↩