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: 20m 19s

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 1.3.0 · @main: Monty 1.3.0 · Python 3.15: CPython 3.15.1 · PyPy 8.0.0

Runtimes and build details

monty · monty · 1.3.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.3.0; source revision and compiler flags unverified
4fdda193d2e9d21a9656c2a6fa428715d51c69a3755aed5b5a72177aeffec4a7

monty-main · monty · 9000dc6cfaffa34a652c5d8e33a55b7cee58c251
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@9000dc6cfaffa34a652c5d8e33a55b7cee58c251; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
4f56414d71fa71c58bd6694f793f83f38ff943f2d053aded5b7efa7c3a4534c1

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 3.11.16 (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
1.86	1.75	14.2	24.7

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	694 / 693	586 / 582	155 / 142	19.3 / 19.3
portfolio_risk	152 / 152	146 / 145	91.9 / 87.7	13.6 / 14.1
game_spectral_norm	733 / 734	628 / 628	151 / 134	23.8 / 22.4
game_fannkuch	2430 / 2440	2310 / 2300	455 / 451	97.8 / 97.0
capacity_planning	81.2 / 79.5	71.0 / 68.8	20.8 / 17.3	4.47 / 4.59
expense_report	0.46 / 0.35	0.51 / 0.36	1.86 / 0.54	0.40 / 0.56
api_report	0.89 / 0.44	0.94 / 0.45	1.97 / 0.63	0.44 / 0.65
perf_float	444 / 396	534 / 461	102 / 95.1	25.4 / 22.8
order_cleanup	0.51 / 0.35	0.58 / 0.41	1.93 / 0.64	0.47 / 0.65
perf_json_loads	1.73 / 1.16	1.92 / 1.36	3.69 / 2.07	1.23 / 1.40
perf_barnes_hut	7180 / 7120	7440 / 7390	1290 / 1230	697 / 561
game_regex_dna	failed / failed	failed / failed	354 / 340	226 / 168
stdout_lines	3.98 / 3.94	4.02 / 4.07	7.12 / 4.62	6.40 / 4.67
memory_string_list_short	360 / 304	352 / 294	166 / 149	93.5 / 100
memory_customer_records	671 / 533	665 / 525	264 / 256	211 / 146
text_csv_aggregate_medium	757 / 728	680 / 653	141 / 131	98.9 / 76.9
text_json_lines_medium	20.5 / 19.4	23.1 / 22.2	27.4 / 25.7	18.5 / 18.2
text_json_parse_medium	16.6 / 11.7	18.7 / 13.7	15.3 / 12.5	10.7 / 10.0
text_json_lines_small	0.96 / 0.58	1.04 / 0.65	0.82 / 0.83	0.71 / 0.78
memory_string_index_short	178 / 142	159 / 124	109 / 93.6	111 / 68.3
game_meteor_contest	549 / 544	603 / 599	127 / 117	92.7 / 88.5
memory_string_list_long	493 / 411	474 / 392	174 / 161	129 / 129
text_csv_cleanup_medium	1460 / 1420	1340 / 1290	261 / 246	193 / 187
text_json_transform_small	0.93 / 0.53	1.00 / 0.55	0.69 / 0.68	0.52 / 0.65
text_json_parse_small	0.78 / 0.41	0.83 / 0.45	0.47 / 0.46	0.36 / 0.49
perf_json_dumps	16.4 / 13.2	18.1 / 14.9	19.1 / 16.4	22.8 / 18.6
game_pidigits	n/a	n/a	220 / 218	195 / 197
text_line_logs_small	0.55 / 0.50	0.60 / 0.56	0.55 / 0.56	0.59 / 0.63
text_json_transform_medium	19.7 / 14.6	21.9 / 16.7	16.7 / 13.9	15.9 / 15.2
text_regex_logs_medium	39.0 / 37.1	40.8 / 39.4	23.4 / 22.0	28.2 / 21.9
memory_string_index_long	250 / 202	223 / 176	122 / 106	127 / 107
text_regex_logs_small	1.51 / 0.96	1.60 / 1.03	0.91 / 0.74	2.58 / 0.98
ticket_search	40.4 / 38.2	39.8 / 37.4	15.1 / 11.6	20.4 / 19.5
text_line_logs_medium	24.3 / 23.7	24.1 / 23.6	12.8 / 11.2	17.5 / 16.9
perf_unpack_sequence	164 / 163	112 / 112	26.3 / 23.2	60.4 / 60.2
text_csv_aggregate_small	8.16 / 7.75	7.46 / 7.08	2.64 / 2.50	8.11 / 8.28
text_csv_cleanup_small	14.8 / 14.3	13.8 / 13.3	4.03 / 3.80	14.6 / 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
text_csv_aggregate_small	19.9	20.0	20.1	58.6
game_nbody	19.9	19.9	20.0	58.7
text_csv_cleanup_small	20.0	20.0	20.1	59.2
game_meteor_contest	19.8	19.8	19.9	61.1
portfolio_risk	19.9	19.9	20.0	58.5
api_report	19.9	19.8	19.9	57.4
stdout_lines	19.9	19.9	19.9	59.4
text_regex_logs_medium	22.2	22.1	22.2	127
perf_unpack_sequence	20.0	20.0	20.1	62.7
order_cleanup	19.8	19.8	19.9	57.4
perf_json_dumps	19.9	19.9	19.9	60.6
text_json_lines_medium	24.9	24.8	24.9	124
text_json_parse_small	19.9	19.9	19.9	57.9
capacity_planning	19.9	19.9	19.9	58.1
text_json_transform_medium	24.4	24.3	24.4	126
expense_report	19.9	19.9	20.0	57.5
game_fannkuch	19.9	19.9	19.9	58.7
text_line_logs_small	19.8	19.9	19.8	57.9
text_line_logs_medium	24.3	24.2	24.2	125
text_json_parse_medium	24.2	24.3	24.2	126
game_spectral_norm	19.9	19.9	19.9	59.1
ticket_search	19.9	19.9	19.9	60.2
perf_barnes_hut	19.9	19.9	19.9	88.8
perf_json_loads	19.8	19.9	19.8	57.4
text_regex_logs_small	19.9	19.9	19.9	58.1
text_json_transform_small	19.9	19.9	19.8	57.9
text_json_lines_small	19.9	19.9	19.8	57.9
memory_string_index_long	68.2	68.1	53.9	124
memory_string_index_short	56.9	56.4	42.3	108
text_csv_cleanup_medium	50.2	49.8	33.8	147
text_csv_aggregate_medium	42.7	42.1	28.0	149
memory_string_list_long	113	113	69.8	125
memory_string_list_short	90.2	89.7	46.5	99.5
memory_customer_records	157	157	68.2	134
perf_float	58.2	58.0	29.3	69.9
game_pidigits	n/a	n/a	20.0	64.9
game_regex_dna	failed	failed	19.9	87.2