Application benchmarks

CPU: Intel(R) Xeon(R) 6973P-C · 4 logical CPUs
OS: Linux-7.0.0-1017-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 12m 40s

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 1.2.0 · @main: Monty 1.3.0 · Python 3.15: CPython 3.15.0 · PyPy 8.0.1

Runtimes and build details

monty · monty · 1.2.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.2.0; source revision and compiler flags unverified
d36ff64238568cd0fa6e152f5359512b7cd78acc000a0659fe1823ebf54b85b5

monty-main · monty · 9ccbaffdd2cfd5839e0a0ff1248ab901de51eb4c
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@9ccbaffdd2cfd5839e0a0ff1248ab901de51eb4c; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
ea6a6ea2c4c42c7fda99d47a28dc9f2e97a6c98cc7c5f8b38aca33a379ecceae

python3.15 · cpython · Python 3.15.0
/opt/hostedtoolcache/Python/3.15.0/x64/bin/python3.15
Source revision and compiler flags unverified
fd580ad81787ecc7e71f91543dbe52ffccd3e5c4cf286565eceb539081e85992

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
1.06	1.01	8.44	14.0

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	356 / 346	341 / 341	83.0 / 82.3	15.8 / 12.9
portfolio_risk	83.9 / 83.7	82.4 / 82.5	57.1 / 57.5	16.8 / 11.7
perf_float	271 / 252	297 / 265	63.4 / 65.8	21.8 / 13.7
game_spectral_norm	361 / 361	345 / 345	79.1 / 79.8	30.6 / 19.2
game_fannkuch	1350 / 1370	1350 / 1400	295 / 292	148 / 74.4
expense_report	0.38 / 0.32	0.44 / 0.35	1.27 / 0.43	0.36 / 0.52
order_cleanup	0.42 / 0.33	0.50 / 0.43	1.32 / 0.51	0.44 / 0.65
api_report	0.72 / 0.50	0.80 / 0.50	1.31 / 0.49	0.43 / 0.55
capacity_planning	44.0 / 42.9	43.0 / 42.1	10.8 / 9.92	4.33 / 3.50
perf_json_loads	1.25 / 1.01	1.39 / 1.13	2.36 / 1.54	1.19 / 1.09
stdout_lines	2.40 / 2.47	2.63 / 2.51	4.71 / 3.59	4.99 / 3.81
text_json_parse_medium	11.0 / 9.01	11.5 / 9.25	10.7 / 9.64	7.25 / 6.32
perf_barnes_hut	3870 / 3910	4240 / 4270	748 / 749	550 / 494
game_regex_dna	failed / failed	failed / failed	225 / 221	267 / 161
memory_customer_records	398 / 372	422 / 356	171 / 173	214 / 131
text_csv_aggregate_medium	394 / 385	410 / 398	82.4 / 82.5	110 / 64.4
perf_json_dumps	9.81 / 8.61	10.9 / 9.82	11.8 / 10.7	21.3 / 12.9
memory_string_list_short	228 / 210	218 / 192	99.3 / 94.1	124 / 75.7
text_json_lines_medium	13.2 / 13.1	13.8 / 13.5	16.3 / 15.8	18.7 / 13.5
memory_string_index_short	104 / 94.2	105 / 91.3	77.5 / 68.7	95.8 / 57.9
text_json_transform_medium	13.3 / 11.1	13.4 / 11.6	11.4 / 10.9	12.4 / 9.76
text_line_logs_small	0.44 / 0.38	0.45 / 0.43	0.41 / 0.42	0.53 / 0.53
text_json_parse_small	0.64 / 0.42	0.67 / 0.47	0.34 / 0.36	0.33 / 0.47
game_meteor_contest	325 / 330	339 / 339	86.6 / 84.6	125 / 82.2
text_json_transform_small	0.74 / 0.54	0.82 / 0.55	0.47 / 0.50	0.48 / 0.61
memory_string_list_long	297 / 279	270 / 235	108 / 102	144 / 103
text_json_lines_small	0.79 / 0.57	0.83 / 0.64	0.55 / 0.56	0.65 / 0.64
game_pidigits	n/a	n/a	145 / 144	223 / 164
text_csv_cleanup_medium	770 / 759	826 / 792	155 / 152	251 / 188
memory_string_index_long	143 / 129	141 / 116	86.5 / 76.9	112 / 106
text_line_logs_medium	14.7 / 14.5	14.1 / 13.9	8.57 / 7.97	17.9 / 11.5
text_regex_logs_medium	23.4 / 22.9	24.0 / 23.5	15.2 / 14.4	54.6 / 24.8
text_regex_logs_small	1.14 / 0.83	1.13 / 0.81	0.61 / 0.51	1.85 / 0.84
ticket_search	23.0 / 22.1	23.5 / 22.8	9.70 / 8.58	20.0 / 15.2
text_csv_aggregate_small	4.33 / 4.19	4.98 / 4.38	1.61 / 1.61	7.44 / 5.92
perf_unpack_sequence	105 / 105	79.9 / 77.0	17.0 / 15.1	58.2 / 39.6
text_csv_cleanup_small	7.99 / 7.89	8.64 / 8.19	2.37 / 2.38	13.9 / 10.9

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
api_report	20.0	19.8	20.0	66.0
order_cleanup	19.8	20.0	20.0	65.8
game_fannkuch	20.0	19.8	20.0	295
capacity_planning	19.9	19.8	20.0	70.7
text_json_lines_small	20.0	19.9	20.0	67.7
text_csv_cleanup_small	20.0	19.9	20.0	79.5
text_json_parse_small	20.0	19.9	20.0	67.4
perf_barnes_hut	20.0	20.0	20.0	301
text_csv_aggregate_small	19.9	19.9	20.0	73.3
game_nbody	20.0	19.9	20.0	77.6
game_spectral_norm	19.9	20.0	20.0	114
text_regex_logs_medium	23.0	22.1	22.1	322
expense_report	20.0	19.9	20.0	65.7
stdout_lines	20.0	20.0	20.0	69.7
perf_json_dumps	19.9	20.0	19.9	91.2
game_meteor_contest	20.0	20.0	20.0	240
perf_unpack_sequence	20.0	20.0	20.0	137
text_json_transform_small	20.0	20.0	20.0	67.5
ticket_search	20.0	20.0	20.0	84.5
text_json_transform_medium	25.5	24.2	24.2	227
text_regex_logs_small	20.0	20.0	20.0	68.5
portfolio_risk	20.0	20.0	20.0	92.4
text_line_logs_medium	24.2	24.2	24.2	241
text_line_logs_small	20.0	20.0	20.0	67.5
text_json_lines_medium	24.6	24.6	24.5	238
perf_json_loads	20.0	19.9	19.8	66.9
text_json_parse_medium	25.6	24.4	24.2	222
memory_string_index_long	71.9	69.6	53.9	236
memory_string_index_short	61.2	58.2	42.3	209
text_csv_cleanup_medium	55.1	51.5	33.8	397
text_csv_aggregate_medium	47.9	44.0	27.9	357
memory_string_list_long	117	114	69.7	322
memory_string_list_short	94.1	91.4	46.4	269
perf_float	63.0	59.7	29.2	93.4
memory_customer_records	163	159	68.0	373
game_pidigits	n/a	n/a	19.9	295
game_regex_dna	failed	failed	19.8	328