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Avoid unnecessary writes to imemo_env during GC

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Similar to the previous commit, to avoid unnecessary Copy-on-Write
memory use we should only set this flag when it has not previously been
set.
This commit is contained in:
John Hawthorn 2024-06-02 23:40:24 -07:00
parent 9d6b8806a4
commit 520ab22725
1 changed files with 3 additions and 1 deletions
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4
imemo.c
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@ -357,7 +357,9 @@ rb_imemo_mark_and_move(VALUE obj, bool reference_updating)
((VALUE *)env->ep)[VM_ENV_DATA_INDEX_ENV] = rb_gc_location(env->ep[VM_ENV_DATA_INDEX_ENV]);
}
else {
VM_ENV_FLAGS_SET(env->ep, VM_ENV_FLAG_WB_REQUIRED);
if (!VM_ENV_FLAGS(env->ep, VM_ENV_FLAG_WB_REQUIRED)) {
VM_ENV_FLAGS_SET(env->ep, VM_ENV_FLAG_WB_REQUIRED);
}
rb_gc_mark_movable( (VALUE)rb_vm_env_prev_env(env));
}
}