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: 18m 10s

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 · 6129db98578d4e99b33bf3858856177e54104923
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@6129db98578d4e99b33bf3858856177e54104923; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
57da6b782550c4f7f1ec5b4f2a1597b767df07bc14ff043eea11fff64ae13d22

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
2.04	2.01	13.6	28.3

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	580 / 587	542 / 555	135 / 128	17.3 / 19.6
portfolio_risk	150 / 154	137 / 139	82.1 / 79.6	12.2 / 13.6
game_spectral_norm	619 / 633	548 / 564	128 / 120	20.9 / 21.0
expense_report	0.38 / 0.32	0.45 / 0.34	1.69 / 0.52	0.36 / 0.52
game_fannkuch	2060 / 2080	2120 / 2130	409 / 407	87.7 / 90.7
capacity_planning	64.8 / 65.6	65.2 / 65.5	17.5 / 15.8	4.06 / 4.58
api_report	0.84 / 0.41	0.88 / 0.43	1.74 / 0.58	0.42 / 0.61
order_cleanup	0.47 / 0.35	0.53 / 0.39	1.71 / 0.58	0.43 / 0.59
perf_float	445 / 408	478 / 426	92.4 / 90.9	23.9 / 23.4
perf_json_loads	1.57 / 1.14	1.77 / 1.28	3.23 / 1.90	1.10 / 1.28
game_regex_dna	failed / failed	failed / failed	306 / 305	207 / 153
memory_customer_records	599 / 583	462 / 412	240 / 254	201 / 135
stdout_lines	3.61 / 3.42	3.33 / 2.96	6.06 / 4.22	5.79 / 4.47
perf_barnes_hut	6210 / 6440	6610 / 6820	1110 / 1110	620 / 659
memory_string_list_short	332 / 300	234 / 233	149 / 140	88.1 / 89.2
text_csv_aggregate_medium	575 / 588	543 / 551	126 / 123	92.1 / 72.8
text_json_lines_medium	17.7 / 18.4	20.7 / 21.2	24.1 / 23.4	16.4 / 18.5
text_json_lines_small	0.90 / 0.53	0.62 / 0.54	0.73 / 0.77	0.65 / 0.71
text_json_parse_medium	15.5 / 11.9	16.7 / 13.1	13.9 / 11.8	9.82 / 9.74
text_json_transform_small	0.87 / 0.49	0.58 / 0.49	0.61 / 0.62	0.46 / 0.59
text_csv_cleanup_medium	1130 / 1150	1060 / 1080	235 / 233	179 / 174
memory_string_index_short	168 / 152	115 / 118	108 / 105	118 / 79.0
memory_string_list_long	452 / 417	422 / 364	162 / 153	123 / 122
game_meteor_contest	495 / 513	518 / 540	109 / 106	84.0 / 83.8
text_json_parse_small	0.73 / 0.38	0.45 / 0.37	0.41 / 0.44	0.33 / 0.48
perf_json_dumps	15.5 / 13.0	16.2 / 14.3	16.8 / 15.4	20.1 / 16.4
text_line_logs_small	0.48 / 0.45	0.52 / 0.47	0.48 / 0.51	0.52 / 0.60
game_pidigits	n/a	n/a	193 / 200	172 / 180
text_json_transform_medium	18.3 / 14.8	20.2 / 16.9	15.2 / 13.6	14.6 / 14.6
memory_string_index_long	231 / 204	218 / 173	124 / 116	131 / 125
text_regex_logs_medium	33.7 / 33.3	34.7 / 34.9	21.4 / 19.7	25.4 / 21.1
text_regex_logs_small	1.34 / 0.87	1.46 / 0.89	0.80 / 0.68	2.32 / 0.99
text_line_logs_medium	20.6 / 20.6	20.9 / 21.1	11.7 / 10.4	16.0 / 16.2
ticket_search	35.6 / 35.3	35.4 / 34.6	13.3 / 11.1	18.4 / 18.5
perf_unpack_sequence	145 / 148	101 / 100	23.7 / 21.4	51.9 / 53.6
text_csv_aggregate_small	6.30 / 6.13	6.23 / 6.09	2.34 / 2.34	7.24 / 7.56
text_csv_cleanup_small	11.4 / 11.4	11.7 / 11.5	3.59 / 3.48	13.1 / 15.0

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
memory_string_list_short	98.4	26.3	46.3	99.7
memory_string_index_short	64.1	26.6	42.1	108
game_nbody	19.9	19.8	20.0	58.9
text_csv_cleanup_small	20.1	19.9	20.1	59.2
stdout_lines	19.9	19.8	19.9	59.4
text_line_logs_medium	24.4	24.2	24.3	125
perf_json_loads	19.9	19.8	19.9	57.8
game_fannkuch	19.9	19.9	19.9	58.8
text_json_transform_small	19.8	19.9	19.9	58.2
order_cleanup	19.9	19.9	19.9	57.8
ticket_search	22.7	19.9	20.0	60.2
perf_unpack_sequence	20.1	20.1	20.1	63.1
api_report	19.9	19.9	19.9	57.8
game_spectral_norm	20.0	19.9	19.9	59.3
text_json_parse_small	20.0	19.8	19.8	58.2
portfolio_risk	19.9	19.9	19.9	58.6
text_json_lines_small	19.9	19.9	19.9	58.2
text_regex_logs_medium	27.6	22.0	22.0	128
text_json_parse_medium	29.4	24.2	24.2	126
text_regex_logs_small	21.6	19.9	19.9	58.2
expense_report	19.9	19.9	19.9	57.8
perf_barnes_hut	20.0	19.9	19.9	89.0
perf_json_dumps	20.7	19.9	19.9	61.1
capacity_planning	22.1	19.9	19.9	58.5
text_json_transform_medium	27.7	24.3	24.3	126
game_meteor_contest	21.0	19.9	19.9	61.0
text_csv_aggregate_small	20.0	20.0	19.9	58.8
text_json_lines_medium	24.6	24.6	24.5	124
text_line_logs_small	19.9	19.9	19.8	58.2
text_csv_aggregate_medium	51.1	30.6	28.0	149
text_csv_cleanup_medium	56.5	38.5	33.8	147
memory_customer_records	167	80.8	68.0	134
memory_string_index_long	73.3	69.3	53.8	124
memory_string_list_long	122	114	69.6	125
perf_float	64.9	59.2	29.3	70.2
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	failed	failed	19.9	89.0