rev-branch-cache: stop truncating cache file...

rev-branch-cache: stop truncating cache file Truncating the file prevent the safe use of mmap. So instead of overwrite the existing data. If more than 20% of the file is to be overwritten, we rewrite the whole file instead. Such whole rewrite is done by replacing the old one with a new one, so mmap of the old file would be affected. This prepare a more aggressive use of mmap in later patches.

marmoute -


            r52798:c564be35

default

Name	Size	Modified	Last Commit	Author
/ mercurial / thirdparty / cbor
cbor2
.travis.yml	Loading ...
LICENSE.txt	Loading ...
README.rst	Loading ...
__init__.py	Loading ...

mercurial/thirdparty/cbor/README.rst

This library provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 7049) serialization format.

There exists another Python CBOR implementation (cbor) which is faster on CPython due to its C extensions. On PyPy, cbor2 and cbor are almost identical in performance. The other implementation also lacks documentation and a comprehensive test suite, does not support most standard extension tags and is known to crash (segfault) when passed a cyclic structure (say, a list containing itself).

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