PHP 8.6 Closure Optimizations

Article

• PHP 8.6 RFC: static closures cached between uses if stateless
• Non-static closures auto-promoted to static when $this unused
• Roughly 3% performance gain from reduced allocations

Discussion

• JS comparison: V8 always allocates new closure instance per evaluation vs PHP’s caching
• Commenter noted ~3% gain felt modest; $this promotion logic was confusing
• PHP old-timer questioned why use PHP over JS at this point

Discuss on HN