Pcov for faster code coverage

[dkarlovi]

https://github.com/krakjoe/pcov

[Guite]

👍
Possible setup in alpine: pecl install pcov && docker-php-ext-enable pcov

[jakzal]

How much faster? :D

[Guite]

How much faster? :D

https://dev.to/swashata/setup-php-pcov-for-5-times-faster-phpunit-code-coverage-3d9c

;-)

[maks-rafalko]

I second this. Today we had one more weird bug with Infection + phpdbg. It just doesn't work for some unknown reason, while works with PHP itself (including xdebug & pcov).

Here is a quote from Joe Watkins (author of phpdbg) about another issue that I spend a week of debugging with:

infection/infection#622 (comment)

I did try to reproduce the issue, I wrote the core of phpdbg and am intimately familiar with it, I'm also aware that aside from mistakes in coverage (which I did not write) it has bugs that may also be effecting you and are stopping me from even doing a full run locally, there's some problem with too many open file handles, class not found and such, this all seems to be connected to your current headache ...

Joe Watkins (krakjoe)

Let's discourage people from using phpdbg. For coverage, we should (must) use pcov from the same author, which is extremely faster.

To give you some numbers, PHPUnit run takes 1.3 minute with pcov vs 4 minutes with Xdebug with xdebug-filter