Mercurial > hg
view contrib/plan9/9mail @ 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 | 4bfd3c7160d9 |
children |
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#!/bin/rc # 9mail - Mercurial email wrapper for upas/marshal fn usage { echo >[1=2] usage: mercurial/9mail -f from to [cc] exit usage } from=() cc=() to=() switch($1){ case -f from=$2 case * usage } to=($3) if(~ $#* 4) cc=(-C $4) upasname=$from upas/marshal $cc $to