Translate functions when no locale are expensive no-ops

[johanee]

When there is no locale loaded WordPress creates a new empty Translations object on every call to any translation function (__(), ...) which is then used to do the fruitless no-op lookup.

Reverting to the 2.7 style (of testing $l10n[$domain] directly in translate() and friends) makes page load of new install of 2.9 trunk front page 17% faster!!

Make not translating text much, much faster

Surely a much better solution to this is to store a static empty translations object and return that rather than re-introducing a lot of duplicated code.

And by an empty translations object I mean one which just returns the strings passed to it not the base Translations class which does some extra work.

Use minimal Empty_Translation object when none available

Do you mean something like the attached? It is slightly less efficient of course -- the price of abstractions -- but still much better than the current version.

Yes something like that is much more attractive.

It makes writing plugins that use the filter much simpler as they don't have to cater for both cases.

Good.

Regarding the filters, though: if you mean the gettext[_with_domain] filters please note that the cases there were identical as far as consumers of the filter are concerned (in the original patch).

I'll attach an updated version of the original approach that makes this more clear, just to be sure. Please select whichever approach you prefer.

If you want any modifications to any of the approaches or have any further questions please just say so.

Non-object approach take 2

Performance for the various patches:

Average total page load time (ab -c 1 -n 100 http://example.org)
Clean 2.9.0 revision 12065 install

1 post front page
org: 47ms
empty-class: 42ms
noop-performance-2: 41ms

10 post front page
org: 95ms
empty-class: 87ms
noop-performance-2: 84ms

Numbers are stable.

I like westi's idea. A lot cleaner code, than repeating the logic in each function.

I added the NOOP_Translation class to GlotPress: ​http://trac.glotpress.org/changeset/291

Keeping the instance if the empty translation class in the global object is both cleaner and faster. No static variables this way. Patch attached.

Thanks nikolay.

I'll merge the whole of the updated pomo and then apply that patch.

(In [12079]) Merge updated pomo code. Includes new NOOP_Translations class see #10971 props nbachiyski.

(In [12080]) Switch to using NOOP_Translations for untranslated sites. Fixes #10971 props nbachiyski.