### 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
const ShapedTextDataFallback *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, 0.0);
	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerFallback *>(this)->_shaped_text_shape(p_shaped);
	}
	return sd->uthk;
}
PackedInt32Array TextServerFallback::_shaped_text_get_character_breaks(const RID &p_shaped) const {
	const ShapedTextDataFallback *sd = shaped_owner.get_or_null(p_shaped);
	ERR_FAIL_COND_V(!sd, PackedInt32Array());
	MutexLock lock(sd->mutex);
	if (!sd->valid) {
		const_cast<TextServerFallback *>(this)->_shaped_text_shape(p_shaped);
	}
	PackedInt32Array ret;
	int size = sd->end - sd->start;
	if (size > 0) {
		ret.resize(size);
		for (int i = 0; i < size; i++) {
			ret.write[i] = i + 1 + sd->start;
		}
	}
	return ret;
}
String TextServerFallback::_string_to_upper(const String &p_string, const String &p_language) const {