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sapling/lib
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Jun Wu 81e68a9a57 xdiff: decrease indent heuristic overhead 
Summary:
Add a "boring" threshold to limit the search range of the indention heuristic,
so the performance of the diff algorithm is mostly unaffected by turning on
indention heuristic.

Reviewed By: ryanmce

Differential Revision: D7145002

fbshipit-source-id: 024ec685f96aa617fb7da141f38fa4e12c4c0fc9
2018-04-13 21:51:21 -07:00
..
cdatapack hg: make sure platform_madvise_away returns -1 on Windows 2018-04-13 21:51:11 -07:00
clib hg: start using imported mman-win32 in the portability headers 2018-04-13 21:51:10 -07:00
linelog hg: basic support for building hg using buck 2018-04-13 21:50:58 -07:00
radixbuf radixbuf: avoid using unstable features in buck build 2018-04-13 21:51:12 -07:00
third-party xdiff: decrease indent heuristic overhead 2018-04-13 21:51:21 -07:00
vlqencoding vlqencoding: add read_vlq_at API that works for AsRef<[u8]> 2018-04-13 21:51:19 -07:00
README.md READMEs: tweaks based on feedback 2018-01-12 12:35:52 -08:00

README.md

lib

Any native code (C/C++/Rust) that Mercurial (either core or extensions) depends on should go here. Python code, or native code that depends on Python code (e.g. #include <Python.h> or use cpython) is disallowed.

As we start to convert more of Mercurial into Rust, and write new paths entrirely in native code, we'll want to limit our dependency on Python, which is why this barrier exists.

See also hgext/extlib/README.md, mercurial/cext/README.mb.

How do I choose between lib and extlib (and cext)?

If your code is native and doesn't depend on Python (awesome!), it goes here.

Otherwise, put it in hgext/extlib (if it's only used by extensions) or mercurial/cext (if it's used by extensions or core).