Mercurial > public > mercurial-scm > hg
comparison mercurial/upgrade_utils/actions.py @ 46874:84a93fa7ecfd
revlog-compression: use zstd by default (if available)
As see in changeset bb271ec2fbfb, zstd is 20% to 50% faster for reading and
writing.
Use take advantage of the new config behavior to try zstd by default, falling
back to zlib is zstd is not available on that plateform.
Differential Revision: https://phab.mercurial-scm.org/D10326
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Tue, 06 Apr 2021 18:55:19 +0200 |
| parents | 3aa78f2aea48 |
| children | 856820b497fc |
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| 46873:0abf5eba0042 | 46874:84a93fa7ecfd |
|---|---|
| 393 @staticmethod | 393 @staticmethod |
| 394 def fromconfig(repo): | 394 def fromconfig(repo): |
| 395 return True | 395 return True |
| 396 | 396 |
| 397 | 397 |
| 398 _has_zstd = ( | |
| 399 b'zstd' in util.compengines | |
| 400 and util.compengines[b'zstd'].available() | |
| 401 and util.compengines[b'zstd'].revlogheader() | |
| 402 ) | |
| 403 | |
| 404 | |
| 398 @registerformatvariant | 405 @registerformatvariant |
| 399 class compressionengine(formatvariant): | 406 class compressionengine(formatvariant): |
| 400 name = b'compression' | 407 name = b'compression' |
| 401 default = b'zlib' | 408 |
| 409 if _has_zstd: | |
| 410 default = b'zstd' | |
| 411 else: | |
| 412 default = b'zlib' | |
| 402 | 413 |
| 403 description = _( | 414 description = _( |
| 404 b'Compresion algorithm used to compress data. ' | 415 b'Compresion algorithm used to compress data. ' |
| 405 b'Some engine are faster than other' | 416 b'Some engine are faster than other' |
| 406 ) | 417 ) |