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Add simple memory allocation benchmark #132

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7ce4e79
Add simple memory allocation benchmark
tiran Feb 8, 2022
633ece4
Use smaller sizes to stress obmalloc
tiran Feb 8, 2022
2554bae
Update docs
tiran Feb 8, 2022
64e87e5
Update pyperformance/data-files/benchmarks/bm_alloc/run_benchmark.py
tiran Feb 8, 2022
a52f1e7
Tag alloc benchmark as micro
tiran Feb 8, 2022
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Use smaller sizes to stress obmalloc
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@tiran
tiran committed Feb 8, 2022
commit 633ece4568ae2b04c281d683c2bdbf0dbb64c1af
25 changes: 21 additions & 4 deletions pyperformance/data-files/benchmarks/bm_alloc/run_benchmark.py
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Expand Up @@ -2,19 +2,36 @@
"""
Allocate blocks of memory with bytearray

This benchmark stresses memory allocator
This benchmark stresses memory allocator. Default sizes are <=
obmalloc small request threshold.
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"""

import pyperf
import sys

import pyperf

ONE_MB = 1024 * 1024
# see Objects/obmalloc.c
SMALL_REQUEST_THRESHOLD = 512
APPEND_SIZE = 10
SIZEOF_BYTEARRAY = sys.getsizeof(bytearray())

DEFAULT_SIZES = [32, 128, 512, 8192, ONE_MB, 8 * ONE_MB]
REPEAT_ALLOCS = 100

DEFAULT_SIZES = [
4,
8,
16,
32,
64,
128,
256,
# keep below obmalloc threshold
SMALL_REQUEST_THRESHOLD - SIZEOF_BYTEARRAY - APPEND_SIZE,
]


def allocate(repeat, sizes, alloc_func=bytearray):
append = alloc_func(APPEND_SIZE)
for size in sizes:
append = alloc_func(size)
for i in range(repeat):
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