[PFA 4/n] Optimize constant pre-bound arguments #22829
Open
arnaud-lb wants to merge 4 commits into
Open
Conversation
… of the declaring opline itself This makes the API compatible with creating partials from AST: We can pass &ast->lineno to zend_partial_create()
The declaring op_array is used for multiple purposes: * Generating a PFA name * Finding the filename * Finding whether op_array is cached, and therefore whether the PFA should be cached too However it's not available when evaluating a PFA AST. Remove the declaring_op_array argument, and pass the relevant information directly: * Generate the PFA name at compile time, pass it as argument to zend_partial_create() * Pass the filename and a cacheable flag as argument to zend_partial_create()
Pre-bound arguments are bound to the generated closure's lexical vars:
```
function f($a, $b) {}
$f = f(1, ?);
// Generates:
$tmp = 1;
$f = function ($b) use ($tmp) {
return f($tmp, $b);
};
```
Detect which pre-bound arguments are constant and burn them into the generated
closure instead:
```
function f($a, $b) {}
$f = f(1, ?);
// Generates:
$f = function ($b) {
return f(1, $b);
};
```
arnaud-lb
force-pushed
the
partials-const-arg-opt
branch
from
July 22, 2026 08:06
9d58c43 to
b362aca
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The branch includes GH-22785, but only the commit "PFA: Optimize constant pre-bound arguments" is relevant for this PR.
PFA pre-bound arguments are bound to the generated closure's lexical vars:
Detect which pre-bound arguments are constant and burn them into the generated
closure instead:
This reduces the overhead during both instantiation and invocation of PFAs.
Build failures unrelated