Application benchmarks

CPU: AMD EPYC 9V74 80-Core Processor · 4 logical CPUs
OS: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 15m 49s

Measurement details

Repeated warmups: 3
Timing: Median ms · one-shot / repeated · startup excluded
RSS: Median MiB · separate one-shot processes including startup
Startup: Empty -c command · launch through exit · normal defaults
Sort: Percentage advantage vs chart reference · largest improvement first; click headers to reorder

Monty 1.2.0 · @main: Monty 1.2.0 · Python 3.15: CPython 3.15.0 · PyPy 8.0.0

Runtimes and build details

monty · monty · 1.2.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.2.0; source revision and compiler flags unverified
d36ff64238568cd0fa6e152f5359512b7cd78acc000a0659fe1823ebf54b85b5

monty-main · monty · 9020a069a3eac8af1de7a3179373adb6ce24776d
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@9020a069a3eac8af1de7a3179373adb6ce24776d; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
7c4cf3be92eefbe1191bdf518d0a296d0d4107ca40b691495aee71e498c72bd4

python3.15 · cpython · Python 3.15.0
/opt/hostedtoolcache/Python/3.15.0/x64/bin/python3.15
Source revision and compiler flags unverified
fd580ad81787ecc7e71f91543dbe52ffccd3e5c4cf286565eceb539081e85992

pypy · pypy · Python 3.11.16 (78565394c9b5, Sep 18 2026, 08:00:14) [PyPy 8.0.0 with GCC 14.2.1 20250110 (Red Hat 14.2.1-11)]
/opt/hostedtoolcache/PyPy/3.11.16/x64/bin/pypy3.11
Source revision and compiler flags unverified
7aebd6513a8f1dc8529abecf80d25b66951ddb5e9bab14b2750a7dab7947a94d

Chart baseline

Process startup · ms

Monty	@main	Python 3.15	PyPy
1.71	1.62	11.6	22.2

Runtime · ms · one-shot / repeated

Bars: Python 3.15 = midpoint · blue above = faster, red below = slower · shared asinh scale (5% transition)

Workload	Monty	@main	Python 3.15	PyPy
game_nbody	544 / 544	451 / 447	132 / 110	15.2 / 15.3
portfolio_risk	128 / 127	127 / 127	77.2 / 68.4	10.6 / 11.8
game_spectral_norm	615 / 614	490 / 490	122 / 106	18.0 / 18.5
game_fannkuch	1840 / 1840	1760 / 1780	387 / 352	77.4 / 77.8
capacity_planning	66.3 / 64.7	55.6 / 53.8	15.8 / 13.2	3.58 / 3.71
expense_report	0.37 / 0.30	0.44 / 0.32	1.48 / 0.43	0.34 / 0.47
perf_float	335 / 300	419 / 364	84.4 / 77.5	20.3 / 19.1
api_report	0.73 / 0.39	0.81 / 0.43	1.52 / 0.53	0.38 / 0.54
order_cleanup	0.41 / 0.33	0.49 / 0.39	1.51 / 0.54	0.39 / 0.53
perf_json_loads	1.37 / 0.95	1.52 / 1.11	2.84 / 1.66	0.98 / 1.16
game_regex_dna	failed / failed	failed / failed	290 / 272	180 / 131
perf_barnes_hut	5210 / 5260	5860 / 5880	995 / 978	544 / 500
memory_string_list_short	262 / 218	265 / 219	136 / 119	73.0 / 79.2
memory_customer_records	537 / 436	525 / 427	212 / 212	172 / 116
stdout_lines	3.25 / 2.87	3.10 / 3.20	5.57 / 3.66	5.09 / 3.88
text_csv_aggregate_medium	493 / 480	544 / 527	106 / 102	80.8 / 64.0
memory_string_index_short	127 / 109	135 / 116	92.3 / 87.2	93.4 / 58.5
text_json_lines_medium	15.9 / 15.7	18.1 / 17.8	21.5 / 20.3	14.8 / 15.7
perf_json_dumps	11.7 / 9.36	14.1 / 11.7	14.8 / 13.1	17.9 / 15.8
text_json_parse_medium	13.3 / 9.81	15.0 / 11.3	12.2 / 10.6	8.79 / 8.49
game_meteor_contest	434 / 434	458 / 460	99.1 / 92.8	72.3 / 71.0
memory_string_list_long	365 / 304	359 / 292	144 / 128	106 / 100
text_csv_cleanup_medium	970 / 964	1050 / 1050	202 / 202	156 / 154
text_json_lines_small	0.81 / 0.50	0.84 / 0.53	0.63 / 0.66	0.58 / 0.62
text_json_transform_small	0.77 / 0.43	0.83 / 0.46	0.54 / 0.55	0.42 / 0.54
text_json_parse_small	0.66 / 0.35	0.70 / 0.37	0.37 / 0.39	0.29 / 0.41
game_pidigits	n/a	n/a	171 / 170	152 / 154
text_line_logs_small	0.45 / 0.42	0.49 / 0.44	0.43 / 0.46	0.47 / 0.51
memory_string_index_long	185 / 157	192 / 155	102 / 95.5	105 / 89.0
text_json_transform_medium	15.7 / 12.0	17.4 / 13.7	13.2 / 11.6	13.2 / 12.7
text_regex_logs_medium	29.3 / 28.0	31.8 / 30.7	18.4 / 16.9	22.2 / 17.8
text_line_logs_medium	19.3 / 19.1	19.0 / 18.5	10.5 / 9.30	14.0 / 13.8
ticket_search	31.8 / 30.7	31.5 / 30.4	11.8 / 9.50	16.0 / 16.0
text_regex_logs_small	1.21 / 0.78	1.29 / 0.82	0.72 / 0.57	2.08 / 0.91
perf_unpack_sequence	128 / 127	88.0 / 86.6	20.7 / 19.7	47.1 / 49.0
text_csv_aggregate_small	5.27 / 5.04	5.77 / 5.54	2.04 / 1.98	6.39 / 6.66
text_csv_cleanup_small	9.72 / 9.43	10.7 / 10.3	3.15 / 3.01	11.4 / 12.2

Peak RSS · MiB · one-shot

Bars: Python 3.15 = midpoint · blue above = less memory, red below = more memory · shared asinh scale (5% transition)

Workload	Monty	@main	Python 3.15	PyPy
text_regex_logs_medium	22.0	22.2	22.2	127
game_meteor_contest	20.0	20.0	20.1	61.0
text_json_lines_medium	24.9	24.8	24.9	124
text_json_parse_medium	24.3	24.3	24.4	126
text_json_transform_medium	24.4	24.3	24.4	126
capacity_planning	20.1	20.0	20.1	58.2
text_json_transform_small	20.0	20.0	20.1	57.9
ticket_search	20.0	20.0	20.1	60.2
text_line_logs_small	20.0	20.1	20.1	57.9
portfolio_risk	20.0	20.0	20.0	58.6
text_regex_logs_small	20.1	20.0	20.1	58.2
expense_report	20.0	19.9	20.0	57.4
game_spectral_norm	20.1	20.0	20.1	59.2
text_csv_aggregate_small	20.0	20.0	20.0	58.6
perf_unpack_sequence	20.0	20.0	20.0	63.0
text_json_parse_small	20.0	20.1	20.0	57.9
game_nbody	20.1	20.1	20.1	58.8
perf_json_loads	20.1	20.1	20.1	57.5
perf_json_dumps	20.0	20.0	20.0	60.7
stdout_lines	20.0	20.0	20.0	59.4
game_fannkuch	20.0	20.0	19.9	58.8
text_csv_cleanup_small	20.1	20.0	20.0	59.2
order_cleanup	20.1	20.1	20.0	57.4
text_json_lines_small	20.0	20.0	20.0	57.9
perf_barnes_hut	20.1	20.1	20.0	88.9
api_report	20.1	20.0	20.0	57.5
text_line_logs_medium	24.4	24.3	24.2	125
memory_string_index_long	67.8	68.1	54.0	124
memory_string_index_short	56.2	56.7	42.4	108
text_csv_cleanup_medium	50.2	50.0	33.9	147
text_csv_aggregate_medium	42.4	42.3	28.1	149
memory_string_list_long	112	113	69.8	125
memory_string_list_short	89.6	90.3	46.5	99.5
memory_customer_records	157	157	68.1	134
perf_float	57.8	58.3	29.3	69.9
game_pidigits	n/a	n/a	20.0	64.9
game_regex_dna	failed	failed	20.1	87.2