Mercurial > hg
view tests/test-issue612.t @ 50400:95acba2c29f6
encoding: avoid quadratic time complexity when json-encoding non-UTF8 strings
Apparently the code uses "+=" with a bytes object, which is linear-time, so the
whole encoding is quadratic-time. This patch makes us use a bytearray object,
instead, which has a(n amortized-)constant-time append operation.
The encoding is still not particularly fast, but at least a 10MB file
takes tens of seconds, not many hours to encode.
author | Arseniy Alekseyev <aalekseyev@janestreet.com> |
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date | Mon, 06 Mar 2023 11:27:57 +0000 |
parents | 55c6ebd11cb9 |
children |
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https://bz.mercurial-scm.org/612 $ hg init repo $ cd repo $ mkdir src $ echo a > src/a.c $ hg ci -Ama adding src/a.c $ hg mv src source moving src/a.c to source/a.c $ hg ci -Ammove $ hg co -C 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo new > src/a.c $ echo compiled > src/a.o $ hg ci -mupdate created new head $ hg status ? src/a.o $ hg merge merging src/a.c and source/a.c to source/a.c 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status M source/a.c R src/a.c ? src/a.o