extphprs / ext-php-rs / 24425467643

66%

Build Type

push

github

Committed by web-flow

Commit Message

perf: cache property lookups across repeated accesses (#726)

When PHP reads or writes an object property (e.g. `$obj->name`), ext-php-rs
previously searched through all registered properties by name on every single
access. In a loop hitting the same property 100k times, that same search ran
100k times.

PHP provides a per-opcode "cache slot" mechanism to avoid this. On the first
access, we now store the resolved property descriptor pointer in the cache
slot. On all subsequent accesses to the same property on the same class, we
skip the search entirely and read the cached pointer directly -- a single
pointer comparison instead of string conversions and linear scans.

Applied to all three property handlers: read, write, and isset/exists.

Benchmarks (callgrind, 100k iterations):
  - Property reads:  235M -> 93.5M instructions (-60%)
  - Property writes: 220M -> 75.7M instructions (-66%)

Coverage Stats

0 of 38 new or added lines in 1 file covered. (0.0%)

2 existing lines in 1 file now uncovered.

8426 of 12749 relevant lines covered (66.09%)

33.3 hits per line