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Sergey Miryanov sergey-miryanov

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Father of the little toddler, may be spontaneously unavailable
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sergey-miryanov / gc-bench.py
Created January 28, 2026 18:26
import collections.abc
import gc
import random
import sys
import statistics
import time
import pyperf
# Adapted from https://gist.github.com/stedolan/4369a0fa27820e27d6e56bee5e412896
# See https://github.com/ocaml/ocaml/pull/10195
@sergey-miryanov
sergey-miryanov / results.md
Last active January 28, 2026 17:32
@sergey-miryanov
sergey-miryanov / b142516.py
Created December 17, 2025 19:00
import httpx
import psutil
import asyncio
import gc
import os
def get_rss():
p = psutil.Process()
mem_info = p.memory_info()
@sergey-miryanov
sergey-miryanov / run_sphinx_bench.py
Created December 4, 2025 20:50 — forked from nascheme/run_sphinx_bench.py
Benchmark of sphinx processing typing.rst file
#!/usr/bin/env ./python
import contextlib
import os
import sys
import shutil
import subprocess
import time
import venv
from pathlib import Path
import tempfile
@sergey-miryanov
sergey-miryanov / gc_big.py
Created December 4, 2025 20:49 — forked from nascheme/gc_big.py
Python GC benchmark based on OCaml pre-fetch PR
import gc
import time
import statistics
# Adapted from https://gist.github.com/stedolan/4369a0fa27820e27d6e56bee5e412896
# See https://github.com/ocaml/ocaml/pull/10195
#
# In Python (free threading), this uses closer to 1.9 GiB of memory isntead of 800 MiB
# perf stat -e L1-dcache-loads,L1-dcache-load-misses,LLC-loads,LLC-load-misses ./python gc_big_800m.py
@sergey-miryanov
sergey-miryanov / gc_big_tree.py
Created December 4, 2025 20:49 — forked from nascheme/gc_big_tree.py
BTree benchmark for testing cyclic GC performance
import sys
import gc
import random
import time
import collections.abc
import statistics
# perf stat -e L1-dcache-loads,L1-dcache-load-misses,LLC-loads,LLC-load-misses ./python gc_big_tree.py
# perf stat -e l3_request_g1.caching_l3_cache_accesses,l3_comb_clstr_state.request_miss ./python gc_big_tree.py
@sergey-miryanov
sergey-miryanov / asyncio.md
Created November 28, 2025 20:39 — forked from kumaraditya303/asyncio.md

asyncio

async generator's finalization is broken

import asyncio
work_done = False

async def cursor():
 try:
@sergey-miryanov
sergey-miryanov / gist:78d49cffbcba3f55245d5ac4eb857fd3
Created October 10, 2025 05:04
+--------------------------+----------+------------------------+
| Benchmark | win-main | main |
+==========================+==========+========================+
| 2to3 | 342 ms | 171 ms: 2.01x faster |
+--------------------------+----------+------------------------+
| async_generators | 436 ms | 269 ms: 1.62x faster |
+--------------------------+----------+------------------------+
| asyncio_tcp | 659 ms | 301 ms: 2.19x faster |
+--------------------------+----------+------------------------+
| asyncio_tcp_ssl | 1.82 sec | 801 ms: 2.27x faster |
@sergey-miryanov
sergey-miryanov / gist:2ad70c0e9ffa7259c415a24825035ce7
Created October 9, 2025 20:21
+--------------------------+----------+------------------------+
| Benchmark | win-main | main |
+==========================+==========+========================+
| 2to3 | 342 ms | 174 ms: 1.97x faster |
+--------------------------+----------+------------------------+
| async_generators | 436 ms | 262 ms: 1.66x faster |
+--------------------------+----------+------------------------+
| asyncio_tcp | 659 ms | 304 ms: 2.17x faster |
+--------------------------+----------+------------------------+
| asyncio_tcp_ssl | 1.82 sec | 805 ms: 2.26x faster |
@sergey-miryanov
sergey-miryanov / gist:633666a24e6b745d9b7defe3d8a02969
Created July 17, 2025 19:56
immortals
## Бессмертные объекты и субинтерпретаторы
Интересный факт - если посмотреть код реализации субинтерпретаторов, то никаких отсылок к бессмертным объектам найти не удастся. При этом они являются неотъемлемой основой субинтерпретаторов в CPython.
Как это происходит?
Как уже упоминалось выше, к бессмертным объектам относятся:
1. *статически* выделенные константы - `None`, `False`, `True`, `...`, `NotImplementedType`, `0`, `1`, `''`, `b''`, `()`. (`object.c:_Py_GetConstant_Init`)
2. целые числа в диапазоне [-5, 256] (`pycore_runtime_structs.h:_Py_static_objects`)
3. символы в кодировке latin1
4. статические типы (`_Py_TPFLAGS_STATIC_BUILTIN`), а также их компоненты, такие как, базовый класс, список базовых классов, `MRO` (method-resolution order)
5. интернированные строки и идентификаторы (`pycore_runtime_structs.h:_Py_cached_objects`)