Re: GC Improvements in PHP 7.3.0

On 07.12.2018 at 19:51, Michael Kliewe wrote: > Am 07.12.2018 um 16:11 schrieb Christoph M. Becker: > >> NEWS has the following entry[1]: >> >> | Improved PHP GC. (Dmitry, Nikita) >> >> I have not been able to find further info regarding this. So my >> question: are these minor improvements, or should they be documented in >> the migration guide? If the latter, could somebody please roughly >> explain these improvements (are they general performance enhancements, >> or only for particular use-cases, or whatever). >> >> [1] >> <https://github.com/php/php-src/blob/php-7.3.0/NEWS#L6> > > it's  a huge improvement in some cases, when you have many objects > flying around. > > For example in DomPDF (in an artificial performance test) I saw an > improvement from 7 seconds down to 2.7 seconds. It was roughly the same > improvement compared to disabling the GC. > > > https://github.com/dompdf/dompdf/issues/1813#issuecomment-429228260 > > Composer disabled the GC and saw a big performance improvement: > > https://blog.blackfire.io/performance-impact-of-the-php-garbage-collector.html > Maybe with 7.3 they don't have to disable it anymore... I didn't test. > > Here are some performance numbers from nikic: > > > https://github.com/php/php-src/pull/3165#pullrequestreview-100399813 > > I would consider it a very nice performance improvement, that can lead > to a faster adoption of 7.3 if you do some marketing with it. A 3x or 5x > improvement is huge. Would be nice to see numbers when using frameworks, > or Wordpress... Thanks! Then it should definitely be mentioned in the migration guide. I'll see to it. -- Christoph M. Becker