### Godot version

8449592d92eaeef990f5502b419d491ee3eeb7a6

### System information

Windows 11

### Issue description

Zooming in the script editor on an empty script freezes the entire editor for a few seconds, but if the file is large then it freezes for 4-5 seconds (which is unacceptable). Looks like a recent regression.

### Steps to reproduce

Just zoom in/out on the large script file.

### Minimal reproduction project

N/A
FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	if (fd->language_support_overrides.has(p_language)) {
		return fd->language_support_overrides[p_language];
	} else {
		return true;
	}
}
void TextServerFallback::_font_set_language_support_override(const RID &p_font_rid, const String &p_language, bool p_supported) {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->language_support_overrides[p_language] = p_supported;
}
bool TextServerFallback::_font_get_language_support_override(const RID &p_font_rid, const String &p_language) {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->language_support_overrides[p_language];
}
void TextServerFallback::_font_remove_language_support_override(const RID &p_font_rid, const String &p_language) {