Paul Ganssle <[email protected]> added the comment:
I have compiled both versions with optimizations on, looks like the gap gets a
bit smaller (percentage-wise) after that:
benchmark | master (ns) | PR 15633 (ns) | Δ (%)
------------------------------------+---------------+-----------------+----------
call only (datetime) | 73 (±3) | 92.3 (±7) | 26
constructor + call (datetime) | 228 (±9) | 260 (±16) | 14
timedelta + call (datetime) | 108 (±5) | 128 (±9) | 18
If this were something fundamental like a performance regression in building a
tuple or constructing a dictionary or something I'd be concerned, but this just
reinforces my feeling that, on balance, this is worth it, and that we are
probably not going to need a "fast path" version of this.
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<https://bugs.python.org/issue24416>
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