Improve performance of os.join by replacing map with a direct method call #117648
Description
Feature or enhancement
Proposal:
We can improve performance of os.join by changing
for b in map(os.fspath, p):
into
for w in p:
b=os.fspath(w)
The map generator takes time to create and the application of the method to each element also takes some time. A quick benchmark
main: 385 ns ± 11.5 ns per loop (mean ± std. dev. of 7 runs, 1,000,000 loops each)
map replaced: 328 ns ± 9.8 ns per loop (mean ± std. dev. of 7 runs, 1,000,000 loops each)
The idea still needs to be tested on other platforms and with longer sequences.
Has this already been discussed elsewhere?
This is a minor feature, which does not need previous discussion elsewhere
Links to previous discussion of this feature:
No response