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status: prefer relative paths in Rust code...
status: prefer relative paths in Rust code … when the repository root is under the current directory, so the kernel needs to traverse fewer directory in every call to `read_dir` or `symlink_metadata`. Better yet would be to use libc functions like `openat` and `fstatat` to remove such repeated traversals entirely, but the standard library does not provide APIs based on those. Maybe with a crate like https://crates.io/crates/openat instead? Benchmarks of `rhg status` show that this patch is neutral in some configurations, and makes the command up to ~20% faster in others. Below is semi-arbitrary subset of results. The four numeric columns are: time (in seconds) with this changeset’s parent, time with this changeset, time difference (negative is better), time ratio (less than 1 is better). ``` mercurial-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.0061 -> 0.0059: -0.0002 (0.97) mercurial-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0029 -> 0.0028: -0.0001 (0.97) mozilla-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.2110 -> 0.2102: -0.0007 (1.00) mozilla-dirstate-v2 | default-copies-clean.ignored.pbr | 0.0489 -> 0.0401: -0.0088 (0.82) mozilla-dirstate-v2 | default-copies-clean.no-iu.pbr | 0.0479 -> 0.0393: -0.0085 (0.82) mozilla-dirstate-v2 | default-copies-large.all.pbr | 0.1262 -> 0.1210: -0.0051 (0.96) mozilla-dirstate-v2 | default-copies-small.ignored-unknown.pbr | 0.1262 -> 0.1200: -0.0062 (0.95) mozilla-dirstate-v2 | default-copies-small.ignored.pbr | 0.0536 -> 0.0417: -0.0119 (0.78) mozilla-dirstate-v2 | default-copies-small.no-iu.pbr | 0.0482 -> 0.0393: -0.0089 (0.81) mozilla-dirstate-v2 | default-plain-clean.ignored.pbr | 0.0518 -> 0.0402: -0.0116 (0.78) mozilla-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0481 -> 0.0392: -0.0088 (0.82) mozilla-dirstate-v2 | default-plain-large.all.pbr | 0.1271 -> 0.1218: -0.0052 (0.96) mozilla-dirstate-v2 | default-plain-small.ignored-unknown.pbr | 0.1225 -> 0.1202: -0.0022 (0.98) mozilla-dirstate-v2 | default-plain-small.ignored.pbr | 0.0510 -> 0.0418: -0.0092 (0.82) mozilla-dirstate-v2 | default-plain-small.no-iu.pbr | 0.0480 -> 0.0394: -0.0086 (0.82) netbeans-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.1442 -> 0.1422: -0.0020 (0.99) netbeans-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0325 -> 0.0282: -0.0043 (0.87) ``` Differential Revision: https://phab.mercurial-scm.org/D12175
Gregory Szorc - - Load All Authors

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test_module_attributes.py
70 lines | 1.9 KiB | text/x-python | PythonLexer
/ contrib / python-zstandard / tests / test_module_attributes.py
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from __future__ import unicode_literals
import unittest
import zstandard as zstd
from .common import (
make_cffi,
TestCase,
)
@make_cffi
class TestModuleAttributes(TestCase):
def test_version(self):
self.assertEqual(zstd.ZSTD_VERSION, (1, 4, 4))
self.assertEqual(zstd.__version__, "0.13.0")
def test_constants(self):
self.assertEqual(zstd.MAX_COMPRESSION_LEVEL, 22)
self.assertEqual(zstd.FRAME_HEADER, b"\x28\xb5\x2f\xfd")
def test_hasattr(self):
attrs = (
"CONTENTSIZE_UNKNOWN",
"CONTENTSIZE_ERROR",
"COMPRESSION_RECOMMENDED_INPUT_SIZE",
"COMPRESSION_RECOMMENDED_OUTPUT_SIZE",
"DECOMPRESSION_RECOMMENDED_INPUT_SIZE",
"DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE",
"MAGIC_NUMBER",
"FLUSH_BLOCK",
"FLUSH_FRAME",
"BLOCKSIZELOG_MAX",
"BLOCKSIZE_MAX",
"WINDOWLOG_MIN",
"WINDOWLOG_MAX",
"CHAINLOG_MIN",
"CHAINLOG_MAX",
"HASHLOG_MIN",
"HASHLOG_MAX",
"HASHLOG3_MAX",
"MINMATCH_MIN",
"MINMATCH_MAX",
"SEARCHLOG_MIN",
"SEARCHLOG_MAX",
"SEARCHLENGTH_MIN",
"SEARCHLENGTH_MAX",
"TARGETLENGTH_MIN",
"TARGETLENGTH_MAX",
"LDM_MINMATCH_MIN",
"LDM_MINMATCH_MAX",
"LDM_BUCKETSIZELOG_MAX",
"STRATEGY_FAST",
"STRATEGY_DFAST",
"STRATEGY_GREEDY",
"STRATEGY_LAZY",
"STRATEGY_LAZY2",
"STRATEGY_BTLAZY2",
"STRATEGY_BTOPT",
"STRATEGY_BTULTRA",
"STRATEGY_BTULTRA2",
"DICT_TYPE_AUTO",
"DICT_TYPE_RAWCONTENT",
"DICT_TYPE_FULLDICT",
)
for a in attrs:
self.assertTrue(hasattr(zstd, a), a)