Why there is no '--enable-optimizations' for python 2.7 images?

[gcavalcante8808]

Hello Folks,

Looks like the python 2.7 images aren't using the '--enable-optimizations' in the configure step of python compilation (

python/2.7/buster/slim/Dockerfile

Line 62 in cf68ae0

&& ./configure \

). Is there any problem or reason to do so?

I just built an image locally with the flag and it worked.

Thanks in advance.

[wglambert]

There was a large discussion on this in #160

And a pr close in #357 (comment) due to the extraordinarily longer build times

[tianon]

If you look at the build logs for your local build with the flag added right after ./configure ... runs, you'll probably see something to the effect of "ignoring unknown flag" because Python 2.x doesn't actually support/use this flag (and thus ignores it, which is why your build still works).

[blopker]

It looks like the 2.7 Dockerfiles are built off the "caveman" template. This template does not seem to have the optimization flag. We build our own Pythons so I do know that 2.7 does support the optimization flag. Maybe it should be added to the caveman template.

[tianon]

I could've sworn this wasn't supported back when we did #357 but either way, I've got #440 open with this change now. 👍