Author vstinner
Recipients inada.naoki, serhiy.storchaka, vstinner
Date 2019-06-20.16:33:54
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Message-id <1561048434.41.0.67038507249.issue37348@roundup.psfhosted.org>
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> _PyUnicode_FromASCII(s, len) is faster than PyUnicode_FromString(s) because PyUnicode_FromString() uses temporary _PyUnicodeWriter to support UTF-8.

I don't understand how _PyUnicodeWriter could be slow. It does not overallocate by default. It's just wrapper to implement efficient memory management.

> Oh, wait.  Why we used _PyUnicodeWriter here?

To optimize decoding errors: the error handler can use replacement string longer than 1 character. Overallocation is used in this case.
History
Date User Action Args
2019-06-20 16:33:54vstinnersetrecipients: + vstinner, inada.naoki, serhiy.storchaka
2019-06-20 16:33:54vstinnersetmessageid: <1561048434.41.0.67038507249.issue37348@roundup.psfhosted.org>
2019-06-20 16:33:54vstinnerlinkissue37348 messages
2019-06-20 16:33:54vstinnercreate