benchmarks_backends.md

These benchmarks compare the native Python re module ("simple" backend) with the optional backends. They were run against the CPython source main branch from 2025-12-27 (commit 00e24b80e092e7d36dc189fd260b2a4e730a6e7f), configured and compiled. PathSpec and GitIgnoreSpec are tested using preloaded .gitignore patterns and file paths. File-system speed is not tested.

CPython 3.13.11 on Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	163.4	91.4	0.56	87.2	0.53
5	64.4	74.3	1.15	87.9	1.36
15	24.9	67.3	2.70	84.3	3.38
25	17.5	31.5	1.80	82.5	4.73
50	9.1	21.1	2.31	82.4	9.01
100	4.9	32.7	6.62	77.6	15.73
150	3.6	30.3	8.41	73.0	20.25

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	165.5	102.2	0.62	87.8	0.53
5	65.7	84.2	1.28	88.0	1.34
15	29.2	72.4	2.48	78.5	2.69
25	16.0	32.8	2.06	79.2	4.96
50	9.3	20.4	2.20	77.0	8.29
100	5.2	25.3	4.83	74.4	14.21
150	3.7	28.6	7.68	72.8	19.58

PyPy 3.11.13 (7.3.20) on Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	307.4	42.5	0.14	-	-
5	53.3	37.1	0.70	-	-
15	16.2	31.7	1.96	-	-
25	7.8	22.4	2.86	-	-
50	3.6	16.4	4.55	-	-
100	1.9	18.5	9.92	-	-
150	0.9	19.4	20.93	-	-

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	314.5	41.8	0.13	-	-
5	56.8	36.2	0.64	-	-
15	18.9	31.4	1.66	-	-
25	9.4	22.1	2.34	-	-
50	4.1	15.5	3.79	-	-
100	2.1	15.8	7.46	-	-
150	1.0	17.5	18.14	-	-

CPython 3.13.11 on 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	271.9	187.2	0.69	196.3	0.72
5	106.0	161.1	1.52	198.8	1.88
15	46.1	146.5	3.18	193.3	4.19
25	27.2	55.4	2.04	191.8	7.05
50	15.7	37.8	2.40	190.7	12.12
100	8.5	66.9	7.88	190.9	22.47
150	5.8	60.5	10.46	173.0	29.91

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	276.2	204.6	0.74	194.9	0.71
5	104.7	172.0	1.64	194.1	1.85
15	47.2	154.6	3.27	184.5	3.91
25	29.8	56.8	1.90	183.8	6.16
50	16.0	35.2	2.20	181.8	11.39
100	8.7	53.4	6.15	179.7	20.69
150	6.1	56.3	9.19	176.8	28.84

PyPy 3.11.13 (7.3.20) on 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	578.2	121.4	0.21	-	-
5	113.3	88.5	0.78	-	-
15	43.1	80.0	1.86	-	-
25	27.9	56.3	2.02	-	-
50	13.3	42.8	3.21	-	-
100	5.8	60.2	10.45	-	-
150	3.0	54.2	18.33	-	-

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	577.3	117.5	0.20	-	-
5	106.6	91.7	0.86	-	-
15	42.4	81.3	1.92	-	-
25	27.7	56.9	2.05	-	-
50	12.7	36.0	2.84	-	-
100	6.1	45.1	7.36	-	-
150	3.1	50.3	16.20	-	-

PyPy 3.10.16 (7.3.19) on 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	589.9	106.6	0.18	-	-
5	117.2	91.9	0.78	-	-
15	44.5	81.3	1.83	-	-
25	27.4	44.0	1.60	-	-
50	13.0	32.1	2.48	-	-
100	5.5	51.8	9.36	-	-
150	3.1	47.1	15.28	-	-

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	581.4	106.7	0.18	-	-
5	135.7	90.7	0.67	-	-
15	54.8	81.7	1.49	-	-
25	31.5	43.0	1.36	-	-
50	12.5	30.2	2.41	-	-
100	6.3	42.2	6.69	-	-
150	3.3	44.2	13.51	-	-

CPython 3.13.11 on AMD RYZEN AI MAX+ 395 w/ Radeon 8060S

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	426.1	261.3	0.61	291.5	0.68
5	159.6	230.2	1.44	288.5	1.81
15	69.4	206.5	2.97	279.3	4.02
25	45.8	76.5	1.67	275.9	6.02
50	23.6	53.9	2.29	275.1	11.66
100	13.4	92.4	6.91	271.3	20.29
150	8.7	84.6	9.70	246.5	28.26

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	439.1	282.4	0.64	289.7	0.66
5	163.3	244.6	1.50	291.8	1.79
15	76.5	214.9	2.81	272.9	3.57
25	48.0	78.3	1.63	271.8	5.66
50	23.7	50.3	2.13	268.3	11.34
100	13.1	77.2	5.88	264.0	20.10
150	9.8	79.9	8.14	263.7	26.87

PyPy 3.11.13 (7.3.20) on AMD RYZEN AI MAX+ 395 w/ Radeon 8060S

GitIgnoreSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	898.6	179.0	0.20	-	-
5	161.7	132.0	0.82	-	-
15	62.8	120.1	1.91	-	-
25	38.8	85.7	2.21	-	-
50	20.8	63.2	3.03	-	-
100	9.9	91.5	9.24	-	-
150	5.2	82.5	15.79	-	-

PathSpec.match_files(): 6.5k files

Patterns	simple ops	hyperscan ops	x	re2 ops	x
1	913.0	176.9	0.19	-	-
5	170.1	132.7	0.78	-	-
15	69.7	121.2	1.74	-	-
25	42.4	83.7	1.97	-	-
50	21.0	59.1	2.81	-	-
100	10.8	69.4	6.45	-	-
150	5.7	74.1	13.07	-	-