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[WIP] POC for dynamic GC buffer resizing #3025

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nikic wants to merge 10 commits into from
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[WIP] POC for dynamic GC buffer resizing #3025

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47ce043
Increase GC root field to 32-bit
nikic Dec 30, 2017
54f9ca8
Move HT iterators count into extra_flags space
nikic Dec 30, 2017
cfdccdc
Move HT flags into GC extra flags
nikic Dec 30, 2017
4305baf
Migrate GC to use offsets rather than pointers
nikic Dec 31, 2017
b61229b
Remove additional GC buffers in favor of resizing
nikic Jan 18, 2018
3874eaa
Rename last_unused to buf_size
nikic Jan 18, 2018
1eda5fa
Make collection threshold and buffer size independent
nikic Jan 18, 2018
948cbd2
Forbid nested GC runs
nikic Jan 19, 2018
519ad4c
Ensure roots are collects during temporary gc_disable()
nikic Jan 19, 2018
70aec4c
Implement very simply dynamic GC buffer resizing
nikic Jan 19, 2018
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4 changes: 3 additions & 1 deletion Zend/tests/gc_016.phpt
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,11 @@ $a = new Foo();
$a->a = $a;
unset($a);
var_dump(gc_collect_cycles());
var_dump(gc_collect_cycles());
echo "ok\n"
?>
--EXPECT--
-> int(1)
-> int(0)
int(1)
int(1)
ok
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