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 31s

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 · 5f07d32c70a55889777d787682344084fe4a48c7
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@5f07d32c70a55889777d787682344084fe4a48c7; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
459bd2042bf6b8bed34bb993751cbd694e6cff54ed986b4594b39c42a1a0ce98

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
1.98	1.92	13.7	26.1

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	651 / 651	566 / 588	138 / 136	19.4 / 19.3
portfolio_risk	145 / 145	136 / 137	86.4 / 85.3	12.7 / 14.7
game_spectral_norm	654 / 654	585 / 596	136 / 133	22.7 / 22.5
game_fannkuch	2290 / 2290	2200 / 2260	449 / 448	87.2 / 88.3
expense_report	0.42 / 0.34	0.48 / 0.37	1.90 / 0.58	0.46 / 0.56
perf_float	414 / 374	504 / 452	98.2 / 92.0	24.3 / 20.5
capacity_planning	75.3 / 73.6	67.0 / 66.9	18.4 / 16.8	4.47 / 4.69
order_cleanup	0.48 / 0.36	0.56 / 0.41	1.95 / 0.65	0.52 / 0.65
api_report	0.85 / 0.50	0.94 / 0.50	1.95 / 0.65	0.51 / 0.66
perf_json_loads	1.70 / 1.19	1.84 / 1.52	3.55 / 2.14	1.28 / 1.41
game_regex_dna	failed / failed	failed / failed	325 / 321	219 / 153
memory_string_list_short	338 / 295	325 / 281	165 / 153	85.0 / 102
memory_customer_records	600 / 502	582 / 486	270 / 268	205 / 145
stdout_lines	4.04 / 4.01	4.22 / 4.31	7.45 / 5.31	6.98 / 4.98
perf_barnes_hut	6770 / 6800	7170 / 7320	1250 / 1230	709 / 687
text_csv_aggregate_medium	719 / 697	636 / 633	141 / 134	97.6 / 75.1
memory_string_index_short	158 / 139	159 / 126	116 / 105	110 / 70.0
text_json_parse_medium	15.2 / 11.3	16.8 / 12.9	15.7 / 13.2	10.7 / 10.3
memory_string_list_long	451 / 389	455 / 390	176 / 164	120 / 152
text_json_lines_medium	19.0 / 18.4	21.7 / 21.4	26.7 / 25.4	18.8 / 19.3
text_json_lines_small	0.95 / 0.63	1.03 / 0.70	0.81 / 0.86	0.77 / 0.77
text_csv_cleanup_medium	1390 / 1360	1260 / 1270	262 / 260	196 / 193
game_meteor_contest	513 / 513	547 / 553	121 / 116	92.4 / 87.5
perf_json_dumps	16.0 / 13.3	17.8 / 15.0	18.7 / 16.7	23.4 / 19.4
text_json_transform_small	0.92 / 0.58	0.99 / 0.60	0.70 / 0.69	0.59 / 0.65
text_json_parse_small	0.77 / 0.52	0.84 / 0.49	0.49 / 0.51	0.42 / 0.54
game_pidigits	n/a	n/a	198 / 197	178 / 175
text_line_logs_small	0.55 / 0.54	0.59 / 0.58	0.57 / 0.60	0.63 / 0.66
memory_string_index_long	221 / 186	231 / 187	127 / 112	123 / 101
text_regex_logs_medium	35.8 / 34.8	37.4 / 36.8	24.7 / 23.4	28.6 / 22.2
text_json_transform_medium	18.0 / 14.3	19.9 / 15.6	16.9 / 14.9	16.2 / 15.5
text_line_logs_medium	22.6 / 22.1	23.4 / 23.5	13.9 / 12.5	17.3 / 17.0
text_regex_logs_small	1.45 / 0.97	1.52 / 1.03	0.92 / 0.77	2.67 / 1.15
ticket_search	37.3 / 35.7	37.7 / 36.5	14.5 / 11.5	20.0 / 19.0
perf_unpack_sequence	154 / 152	106 / 105	25.8 / 22.4	58.9 / 58.5
text_csv_aggregate_small	7.72 / 7.39	6.87 / 6.72	2.56 / 2.56	8.34 / 8.45
text_csv_cleanup_small	14.2 / 13.7	13.0 / 12.7	3.86 / 3.77	14.8 / 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
expense_report	19.8	19.8	19.9	57.4
perf_json_dumps	20.0	19.8	19.9	60.6
text_csv_cleanup_small	20.0	20.1	20.1	59.2
perf_json_loads	19.8	19.8	19.9	57.4
text_json_transform_medium	24.4	24.3	24.4	126
text_json_lines_small	19.8	19.9	19.9	57.9
text_json_transform_small	19.9	19.9	19.9	57.9
game_fannkuch	19.9	19.9	19.9	58.7
text_line_logs_small	19.8	19.9	19.9	57.9
text_line_logs_medium	24.3	24.3	24.3	125
stdout_lines	19.9	19.9	19.9	59.4
perf_unpack_sequence	20.1	20.0	20.1	62.9
api_report	20.0	19.9	19.9	57.4
text_json_lines_medium	24.8	24.8	24.8	124
game_nbody	19.9	19.9	19.9	58.7
text_json_parse_small	19.8	19.9	19.8	57.9
text_regex_logs_medium	22.2	22.2	22.2	127
ticket_search	19.9	19.9	19.9	60.2
text_csv_aggregate_small	20.1	20.1	20.1	58.6
text_regex_logs_small	19.9	19.9	19.9	58.2
text_json_parse_medium	24.4	24.3	24.2	126
portfolio_risk	19.8	19.9	19.8	58.4
perf_barnes_hut	19.9	19.9	19.9	88.8
order_cleanup	19.9	19.9	19.9	57.5
game_spectral_norm	19.9	19.9	19.8	59.1
game_meteor_contest	19.9	19.9	19.8	61.0
capacity_planning	19.9	19.9	19.8	58.2
memory_string_index_long	68.7	68.0	53.9	124
memory_string_index_short	57.0	56.3	42.3	108
text_csv_cleanup_medium	50.1	49.9	33.8	147
text_csv_aggregate_medium	42.7	42.1	28.0	149
memory_string_list_long	113	113	69.7	125
memory_string_list_short	90.6	89.8	46.5	99.6
memory_customer_records	157	157	68.1	134
perf_float	58.1	57.9	29.3	69.9
game_pidigits	n/a	n/a	19.8	64.8
game_regex_dna	failed	failed	19.9	87.1