rust: mostly avoid streaming zstd decompression
Streaming ZStd decompression seems slightly slower, and
the API we use makes it very inconvenient to re-use the
decompression context.
Instead of using that, use the buffer-backed version,
because we can give a reasonable-ish size estimate.
# Dummy extension that adds a delay after acquiring a lock.
#
# This extension can be used to test race conditions between lock acquisition.
import os
import time
def reposetup(ui, repo):
class delayedlockrepo(repo.__class__):
def lock(self, wait=True):
delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
res = super(delayedlockrepo, self).lock(wait=wait)
delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
return res
repo.__class__ = delayedlockrepo