diff options
| -rw-r--r-- | Lib/sre_parse.py | 8 | ||||
| -rw-r--r-- | Misc/ACKS | 1 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2019-07-31-16-49-01.bpo-37723.zq6tw8.rst | 2 |
3 files changed, 4 insertions, 7 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index 84c912573e..83119168e6 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -430,13 +430,7 @@ def _escape(source, escape, state): raise source.error("bad escape %s" % escape, len(escape)) def _uniq(items): - if len(set(items)) == len(items): - return items - newitems = [] - for item in items: - if item not in newitems: - newitems.append(item) - return newitems + return list(dict.fromkeys(items)) def _parse_sub(source, state, verbose, nested): # parse an alternation: a|b|c @@ -1708,6 +1708,7 @@ Michael Urman Hector Urtubia Lukas Vacek Ville Vainio +Yann Vaginay Andi Vajda Case Van Horsen John Mark Vandenberg diff --git a/Misc/NEWS.d/next/Library/2019-07-31-16-49-01.bpo-37723.zq6tw8.rst b/Misc/NEWS.d/next/Library/2019-07-31-16-49-01.bpo-37723.zq6tw8.rst new file mode 100644 index 0000000000..65507bd0dc --- /dev/null +++ b/Misc/NEWS.d/next/Library/2019-07-31-16-49-01.bpo-37723.zq6tw8.rst @@ -0,0 +1,2 @@ +Fix performance regression on regular expression parsing with huge +character sets. Patch by Yann Vaginay.
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