Swap BC layer for yield-ready and reclaim perf loss #4216
Merged
+60
−58
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Follows #3999
Fix #4146
Fix #4103
When
use_yield
is set to false (the default), this PR reverts the implementation of therender()
method to use a wrapping output buffer instead of hooking between each steps of generators. In this mode, the behavior of the yield method is not "pure": it triggers a mix of yield and echo. But this is fine for render and display methods.When
use_yield
is set totrue
, we skip that wrapping output buffer. This makes twig compatible with fibers (and this also makes compilation fail if a non-YieldReady extension is found.)That makes the name of the option not ideal, but BC rulez FTW.