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 20s

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)
c9f049b0c75077fd7011ef69a906f5214de07fefe3823f20f70663bd7b3a5442

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
1.74	1.74	12.9	24.5

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	644 / 645	571 / 579	139 / 136	19.2 / 19.8
portfolio_risk	143 / 142	128 / 127	87.2 / 85.5	12.7 / 13.1
game_spectral_norm	645 / 644	567 / 568	135 / 133	23.5 / 22.0
game_fannkuch	2270 / 2260	2150 / 2200	449 / 450	87.0 / 88.1
expense_report	0.42 / 0.34	0.45 / 0.37	1.77 / 0.56	0.45 / 0.55
capacity_planning	75.6 / 73.7	64.6 / 62.4	18.2 / 16.3	4.35 / 4.47
perf_float	415 / 374	515 / 454	96.5 / 91.6	24.4 / 23.9
order_cleanup	0.48 / 0.38	0.52 / 0.43	1.84 / 0.64	0.53 / 0.64
api_report	0.84 / 0.48	0.91 / 0.47	1.82 / 0.61	0.51 / 0.64
perf_json_loads	1.63 / 1.24	1.78 / 1.39	3.49 / 2.10	1.25 / 1.39
perf_barnes_hut	6660 / 6650	7140 / 7150	1250 / 1240	715 / 542
game_regex_dna	failed / failed	failed / failed	325 / 321	216 / 156
memory_string_list_short	342 / 295	338 / 298	162 / 154	83.9 / 91.9
memory_customer_records	592 / 529	588 / 547	268 / 269	200 / 143
text_csv_aggregate_medium	717 / 695	635 / 612	141 / 134	96.1 / 72.5
stdout_lines	3.99 / 4.16	4.16 / 4.46	6.92 / 4.92	6.64 / 4.92
memory_string_index_short	162 / 134	164 / 137	112 / 99.4	105 / 64.4
text_json_parse_medium	15.3 / 11.2	16.5 / 12.4	15.6 / 13.4	10.5 / 10.0
memory_string_list_long	453 / 388	437 / 396	174 / 165	119 / 151
text_json_lines_medium	19.4 / 18.8	21.6 / 21.1	27.2 / 25.4	18.7 / 19.0
text_csv_cleanup_medium	1390 / 1360	1250 / 1220	263 / 257	195 / 186
game_meteor_contest	513 / 513	543 / 557	120 / 118	91.4 / 87.2
text_json_lines_small	0.95 / 0.64	0.99 / 0.68	0.80 / 0.82	0.74 / 0.78
perf_json_dumps	15.8 / 13.3	17.2 / 14.6	18.8 / 16.8	23.8 / 19.2
text_json_transform_small	0.89 / 0.56	0.97 / 0.58	0.69 / 0.70	0.55 / 0.64
text_json_parse_small	0.77 / 0.50	0.83 / 0.52	0.46 / 0.49	0.40 / 0.53
memory_string_index_long	223 / 184	217 / 182	121 / 112	119 / 98.3
text_line_logs_small	0.53 / 0.52	0.59 / 0.57	0.56 / 0.58	0.62 / 0.68
game_pidigits	n/a	n/a	197 / 196	177 / 178
text_json_transform_medium	18.1 / 13.7	19.7 / 15.4	16.9 / 14.7	16.0 / 15.5
text_regex_logs_medium	36.0 / 34.9	40.0 / 38.9	24.6 / 23.2	28.5 / 22.2
text_regex_logs_small	1.40 / 0.99	1.49 / 1.06	0.93 / 0.78	2.60 / 0.95
text_line_logs_medium	23.3 / 22.8	23.7 / 23.5	13.7 / 12.7	17.5 / 16.6
ticket_search	37.0 / 35.1	38.2 / 36.2	14.1 / 11.5	20.6 / 19.1
perf_unpack_sequence	154 / 154	106 / 104	25.4 / 22.2	57.8 / 57.7
text_csv_aggregate_small	7.71 / 7.38	6.86 / 6.52	2.56 / 2.52	8.28 / 8.48
text_csv_cleanup_small	14.2 / 13.7	12.9 / 12.4	3.84 / 3.76	14.7 / 15.2

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
ticket_search	19.8	19.8	19.9	60.2
perf_barnes_hut	19.9	19.8	19.9	88.8
perf_json_dumps	19.9	19.8	19.9	60.6
text_json_transform_medium	24.2	24.4	24.4	126
text_line_logs_small	19.8	19.9	19.9	57.9
stdout_lines	19.9	19.9	19.9	59.4
perf_unpack_sequence	20.1	20.0	20.1	62.9
text_csv_cleanup_small	20.1	20.0	20.1	59.2
capacity_planning	19.9	19.9	19.9	58.2
game_spectral_norm	19.8	19.8	19.9	59.1
text_json_parse_small	19.9	19.9	19.9	57.9
text_json_lines_medium	24.9	24.7	24.8	124
text_json_parse_medium	24.3	24.3	24.4	126
portfolio_risk	19.9	19.9	19.9	58.5
order_cleanup	19.8	19.8	19.9	57.4
game_nbody	19.9	19.9	19.9	58.8
text_regex_logs_medium	22.1	22.1	22.1	127
text_json_lines_small	19.8	19.9	19.9	57.9
text_csv_aggregate_small	20.0	20.1	20.0	58.6
game_meteor_contest	19.9	19.9	19.9	61.0
text_line_logs_medium	24.4	24.3	24.3	125
text_json_transform_small	19.9	19.9	19.9	57.9
game_fannkuch	19.9	19.9	19.9	58.7
perf_json_loads	19.9	19.9	19.9	57.4
api_report	19.9	19.9	19.9	57.4
text_regex_logs_small	19.9	19.9	19.9	58.1
expense_report	19.9	19.9	19.8	57.5
memory_string_index_long	68.2	68.0	53.9	124
memory_string_index_short	56.7	56.5	42.3	108
text_csv_cleanup_medium	50.3	49.9	33.8	147
text_csv_aggregate_medium	42.8	42.1	28.0	149
memory_string_list_long	113	112	69.8	125
memory_string_list_short	90.1	89.7	46.5	99.5
memory_customer_records	157	157	68.1	134
perf_float	57.9	57.9	29.4	69.9
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	failed	failed	19.9	87.2