Application benchmarks

CPU: AMD EPYC 9V74 80-Core Processor · 4 logical CPUs
OS: Linux-7.0.0-1017-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 16m 7s

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 1.4.0 · @main: Monty 1.4.0 · Python 3.15: CPython 3.15.1 · PyPy 8.0.1

Runtimes and build details

monty · monty · 1.4.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.4.0; source revision and compiler flags unverified
4479e7306fdf0c6a2a567aa139150ac47c75ab3c0138ec2c4efa010c382a87e0

monty-main · monty · 0f243e6ae6df760f09040a17604e23d5264b65ba
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@0f243e6ae6df760f09040a17604e23d5264b65ba; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
d51642cf157dc32f62130fdc9ddd7c530d0067620e2511ccd6b8f14f840255e7

python3.15 · cpython · Python 3.15.1
/opt/hostedtoolcache/Python/3.15.1/x64/bin/python3.15
Source revision and compiler flags unverified
3359482397c7a8e9b84606a9d825c3b4e2c2b89ff622d8ddb9a84e939699180a

pypy · pypy · Python 3.11.17 (ec82f20141cf, Oct 13 2026, 15:02:27) [PyPy 8.0.1 with GCC 14.2.1 20250110 (Red Hat 14.2.1-11)]
/opt/hostedtoolcache/PyPy/3.11.17/x64/bin/pypy3.11
Source revision and compiler flags unverified
7aebd6513a8f1dc8529abecf80d25b66951ddb5e9bab14b2750a7dab7947a94d

Chart baseline

Process startup · ms

Monty	@main	Python 3.15	PyPy
1.78	1.75	11.8	25.7

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	514 / 513	460 / 463	118 / 112	15.0 / 15.7
portfolio_risk	132 / 132	122 / 122	72.1 / 67.9	10.8 / 11.6
game_spectral_norm	506 / 507	503 / 501	111 / 104	18.3 / 17.8
expense_report	0.34 / 0.29	0.41 / 0.30	1.46 / 0.45	0.32 / 0.46
game_fannkuch	1750 / 1760	1790 / 1770	355 / 349	77.1 / 77.1
capacity_planning	54.2 / 52.4	55.0 / 53.1	15.4 / 13.4	3.58 / 3.84
api_report	0.73 / 0.38	0.83 / 0.40	1.52 / 0.50	0.37 / 0.54
perf_float	382 / 342	424 / 375	82.8 / 75.8	20.8 / 21.0
order_cleanup	0.40 / 0.30	0.49 / 0.34	1.53 / 0.50	0.39 / 0.54
perf_json_loads	1.39 / 0.97	1.54 / 1.10	2.85 / 1.63	0.98 / 1.13
game_regex_dna	failed / failed	failed / failed	272 / 264	180 / 133
perf_barnes_hut	5490 / 5500	5840 / 5910	989 / 945	546 / 520
stdout_lines	3.16 / 3.16	3.09 / 3.07	5.43 / 3.63	5.17 / 3.85
memory_string_list_short	293 / 239	281 / 235	130 / 120	77.8 / 85.4
memory_customer_records	549 / 448	566 / 526	214 / 212	176 / 132
text_csv_aggregate_medium	567 / 551	536 / 523	112 / 103	83.0 / 68.9
text_json_lines_medium	15.8 / 15.4	17.9 / 17.5	21.7 / 20.3	14.7 / 17.3
text_json_parse_medium	13.7 / 9.84	15.0 / 11.0	12.4 / 10.3	8.93 / 8.87
memory_string_index_short	146 / 123	137 / 109	93.5 / 81.3	104 / 59.4
text_json_lines_small	0.79 / 0.47	0.85 / 0.52	0.63 / 0.64	0.56 / 0.63
text_csv_cleanup_medium	1100 / 1100	1060 / 1050	205 / 196	159 / 145
game_meteor_contest	438 / 439	454 / 455	95.2 / 90.8	72.0 / 69.9
memory_string_list_long	397 / 324	381 / 306	144 / 132	114 / 132
text_json_transform_small	0.76 / 0.42	0.83 / 0.46	0.54 / 0.53	0.43 / 0.52
text_json_parse_small	0.66 / 0.35	0.71 / 0.36	0.36 / 0.37	0.30 / 0.41
text_line_logs_small	0.43 / 0.39	0.47 / 0.43	0.41 / 0.44	0.46 / 0.52
perf_json_dumps	13.9 / 11.3	14.2 / 11.6	14.8 / 12.8	17.7 / 14.4
game_pidigits	n/a	n/a	170 / 170	152 / 154
memory_string_index_long	203 / 170	195 / 158	106 / 97.8	117 / 89.2
text_json_transform_medium	16.3 / 12.1	17.3 / 13.3	13.6 / 11.6	13.1 / 12.9
text_regex_logs_medium	29.3 / 28.5	31.6 / 30.3	18.1 / 17.2	22.7 / 18.4
text_regex_logs_small	1.20 / 0.77	1.28 / 0.83	0.70 / 0.58	2.04 / 0.86
text_line_logs_medium	18.4 / 18.1	19.1 / 18.7	10.2 / 8.68	14.0 / 14.4
ticket_search	31.9 / 30.8	31.0 / 29.7	11.6 / 9.17	16.3 / 16.4
perf_unpack_sequence	127 / 126	82.8 / 82.0	20.7 / 19.2	46.6 / 46.9
text_csv_aggregate_small	6.02 / 5.73	5.78 / 5.49	2.07 / 1.98	6.35 / 6.64
text_csv_cleanup_small	11.0 / 10.7	10.7 / 10.3	3.15 / 3.00	11.5 / 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
game_spectral_norm	19.9	19.8	19.9	59.4
text_json_transform_small	19.8	19.9	19.9	58.2
text_regex_logs_medium	24.2	22.0	22.2	128
text_json_lines_medium	24.5	24.5	24.6	124
perf_json_loads	19.9	19.8	19.9	57.9
text_csv_aggregate_small	19.9	20.1	20.1	58.8
text_line_logs_medium	24.4	24.2	24.4	125
text_json_parse_medium	28.9	24.2	24.3	126
expense_report	19.9	19.9	19.9	57.8
api_report	19.9	19.9	19.9	57.9
text_csv_cleanup_small	20.1	20.0	20.1	59.2
text_line_logs_small	19.9	19.9	19.9	58.2
portfolio_risk	19.9	19.9	19.9	58.6
text_regex_logs_small	20.2	19.9	19.9	58.2
stdout_lines	19.9	19.9	19.9	59.4
perf_barnes_hut	20.8	19.9	19.9	89.0
capacity_planning	21.1	19.9	19.9	58.5
perf_unpack_sequence	20.1	20.0	20.0	63.1
game_nbody	19.9	19.9	19.9	58.9
ticket_search	19.9	19.9	19.9	60.2
game_fannkuch	19.9	19.9	19.9	58.9
text_json_parse_small	19.9	19.9	19.9	58.2
text_json_transform_medium	27.9	24.3	24.3	126
perf_json_dumps	19.9	19.9	19.9	61.0
text_json_lines_small	20.0	19.9	19.9	58.2
game_meteor_contest	19.9	19.9	19.9	61.1
order_cleanup	19.9	19.9	19.8	57.9
memory_string_index_long	75.7	69.4	53.8	124
memory_string_index_short	64.6	57.9	42.2	108
text_csv_cleanup_medium	57.7	51.4	33.8	147
text_csv_aggregate_medium	49.4	43.8	28.0	149
memory_string_list_long	121	114	69.6	125
memory_customer_records	167	159	68.0	134
memory_string_list_short	96.0	91.5	46.3	99.7
perf_float	64.3	59.6	29.3	70.2
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	failed	failed	19.9	89.0