view tests/test-censor2.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.

  $ cat >> $HGRCPATH <<EOF
  > [censor]
  > policy=ignore
  > EOF

  $ mkdir r
  $ cd r
  $ hg init
  $ echo secret > target
  $ hg commit -Am "secret"
  adding target
  $ touch bystander
  $ hg commit -Am "innocent"
  adding bystander
  $ echo erased-secret > target
  $ hg commit -m "erased secret"
  $ hg censor target --config extensions.censor= -r ".^^"
  $ hg update ".^"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cat target
  $ hg update tip
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved