[New-bugs-announce] [issue37348] add _PyUnicode_FROM_ASCII macro

[Inada Naoki]

New submission from Inada Naoki <songofacandy at gmail.com>:

_PyUnicode_FromASCII(s, len) is faster than PyUnicode_FromString(s) because PyUnicode_FromString() uses temporary _PyUnicodeWriter to support UTF-8.

But _PyUnicode_FromASCII("hello", strlen("hello"))` is not as easy as `PyUnicode_FromString("hello")`.

_PyUnicode_FROM_ASCII() is simple macro which wraps _PyUnicode_FromASCII which calls strlen() automatically:

```
/* Convenient wrapper for _PyUnicode_FromASCII */
#define _PyUnicode_FROM_ASCII(s) _PyUnicode_FromASCII((s), strlen(s))
```

I believe recent compilers optimize away calls of strlen().

----------
components: Interpreter Core
messages: 346115
nosy: inada.naoki
priority: normal
severity: normal
status: open
title: add _PyUnicode_FROM_ASCII macro
type: performance
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37348>
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