Application benchmarks

CPU: AMD EPYC 7763 64-Core Processor · 4 logical CPUs
OS: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 19m 11s

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 · dad2fa6661a01efd9753dd1fa944f8cb3618be9c
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@dad2fa6661a01efd9753dd1fa944f8cb3618be9c; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
6bb8bd2bd3b1190e033f51ce0846d8ceff9e9fb53958cd8cc9d2c8c71b67faf9

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
1.88	1.80	13.6	25.3

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	667 / 666	567 / 561	141 / 137	19.3 / 19.5
portfolio_risk	154 / 154	145 / 143	88.0 / 85.3	12.6 / 13.5
game_spectral_norm	718 / 717	606 / 606	144 / 136	22.4 / 22.1
game_fannkuch	2250 / 2250	2220 / 2220	458 / 456	87.7 / 88.2
perf_float	413 / 371	508 / 440	97.3 / 92.4	24.4 / 21.4
expense_report	0.42 / 0.35	0.48 / 0.37	1.78 / 0.55	0.47 / 0.55
capacity_planning	79.6 / 76.9	67.2 / 65.1	18.3 / 16.3	4.44 / 4.32
order_cleanup	0.48 / 0.36	0.57 / 0.42	1.81 / 0.61	0.53 / 0.65
api_report	0.84 / 0.45	0.91 / 0.49	1.81 / 0.59	0.50 / 0.65
perf_json_loads	1.65 / 1.24	1.83 / 1.37	3.47 / 2.09	1.28 / 1.41
game_regex_dna	failed / failed	failed / failed	344 / 331	219 / 153
memory_string_list_short	316 / 276	313 / 264	166 / 150	84.3 / 95.6
perf_barnes_hut	6540 / 6410	7280 / 7220	1260 / 1240	719 / 662
stdout_lines	3.82 / 4.00	4.02 / 3.23	7.08 / 4.88	6.59 / 4.83
text_csv_aggregate_medium	590 / 576	640 / 617	139 / 133	97.2 / 75.6
memory_customer_records	583 / 493	585 / 516	259 / 255	202 / 149
memory_string_index_short	149 / 124	157 / 128	115 / 105	106 / 71.0
text_json_parse_medium	15.8 / 11.9	17.3 / 13.2	15.8 / 13.6	10.7 / 10.3
memory_string_list_long	424 / 382	440 / 400	175 / 157	119 / 146
text_json_lines_medium	19.9 / 19.1	22.7 / 22.0	27.2 / 25.8	18.9 / 19.0
perf_json_dumps	14.5 / 11.9	16.6 / 14.1	19.0 / 17.0	23.9 / 19.6
game_meteor_contest	513 / 512	542 / 540	122 / 121	91.4 / 87.5
text_csv_cleanup_medium	1160 / 1130	1250 / 1220	262 / 257	195 / 198
text_json_lines_small	0.95 / 0.64	1.03 / 0.69	0.79 / 0.81	0.76 / 0.78
text_json_transform_small	0.89 / 0.55	0.97 / 0.59	0.67 / 0.68	0.56 / 0.66
text_json_parse_small	0.79 / 0.49	0.82 / 0.49	0.48 / 0.49	0.40 / 0.51
game_pidigits	n/a	n/a	205 / 205	177 / 179
text_line_logs_small	0.55 / 0.54	0.60 / 0.54	0.56 / 0.60	0.63 / 0.69
text_json_transform_medium	18.3 / 13.9	20.6 / 16.6	17.1 / 15.4	15.8 / 15.0
memory_string_index_long	207 / 174	224 / 184	126 / 116	122 / 106
text_regex_logs_medium	36.8 / 35.2	37.2 / 36.1	25.4 / 23.7	28.5 / 22.7
text_regex_logs_small	1.42 / 0.95	1.47 / 0.98	0.93 / 0.77	2.65 / 1.03
text_line_logs_medium	24.0 / 23.5	23.0 / 22.6	13.7 / 12.8	17.4 / 17.0
ticket_search	39.0 / 36.7	38.1 / 36.1	14.2 / 11.5	20.5 / 20.0
perf_unpack_sequence	156 / 156	104 / 104	26.2 / 23.0	58.4 / 58.9
text_csv_aggregate_small	6.45 / 6.08	6.89 / 6.54	2.49 / 2.44	8.30 / 8.56
text_csv_cleanup_small	12.0 / 11.5	12.9 / 12.4	3.83 / 3.77	14.9 / 15.3

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
game_nbody	20.0	19.9	20.0	58.8
stdout_lines	20.0	19.9	20.0	59.4
expense_report	20.0	19.9	20.0	57.4
text_line_logs_medium	24.3	24.3	24.4	125
text_json_transform_small	19.9	20.0	20.0	57.9
perf_barnes_hut	19.9	19.9	20.0	88.8
text_regex_logs_small	20.0	19.9	20.0	58.1
text_json_parse_medium	24.3	24.4	24.4	126
game_meteor_contest	20.0	19.9	19.9	60.9
capacity_planning	19.9	20.0	19.9	58.2
perf_json_dumps	20.0	20.0	20.0	60.5
text_json_lines_medium	24.8	24.7	24.8	124
text_line_logs_small	19.9	19.9	19.9	57.9
game_fannkuch	20.0	20.0	20.0	58.8
text_csv_cleanup_small	20.0	20.0	20.0	59.1
text_csv_aggregate_small	20.0	20.0	20.0	58.6
text_regex_logs_medium	22.2	22.1	22.1	127
text_json_parse_small	20.0	20.0	20.0	57.9
perf_unpack_sequence	20.0	20.0	20.0	62.7
portfolio_risk	20.0	20.0	20.0	58.5
text_json_transform_medium	24.3	24.3	24.2	126
text_json_lines_small	19.9	20.0	19.9	57.9
ticket_search	20.0	20.0	19.9	60.1
order_cleanup	20.0	20.0	19.9	57.4
api_report	20.0	20.0	19.9	57.4
perf_json_loads	20.0	20.0	19.9	57.4
game_spectral_norm	20.0	20.0	19.9	59.1
memory_string_index_long	67.7	68.1	54.0	124
memory_string_index_short	56.2	56.7	42.3	108
text_csv_cleanup_medium	50.2	50.0	33.8	147
text_csv_aggregate_medium	42.3	42.5	28.0	149
memory_string_list_long	113	113	69.8	125
memory_string_list_short	89.8	90.2	46.5	99.5
perf_float	57.4	58.0	29.4	69.9
memory_customer_records	157	157	68.0	134
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	failed	failed	20.0	87.1