### 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 String lang = (p_language.is_empty()) ? TranslationServer::get_singleton()->get_tool_locale() : p_language;
	// Convert to UTF-16.
	Char16String utf16 = p_string.utf16();
	HashSet<int> breaks;
	UErrorCode err = U_ZERO_ERROR;
	UBreakIterator *bi = ubrk_open(UBRK_LINE, lang.ascii().get_data(), (co_data(), utf16.length(), &err);
	if (U_SUCCESS(err)) {
		while (ubrk_next(bi) != UBRK_DONE) {
			int pos = _convert_pos(p_string, utf16, ubrk_current(bi)) - 1;
			if (pos != p_string.length() - 1) {
				breaks.insert(pos);
			}
		}
		ubrk_close(bi);
	}
	PackedInt32Array ret;
	int line_start = 0;
	int line_end = 0; // End of last word on current line.
	int word_start = 0; // -1 if no word encountered. Leading spaces are part of a word.
	int word_length = 0;
	for (int i = 0; i < p_string.length(); i++) {
		const char32_t c = p_string[i];
		if (is_linebreak(c)) {
			// Force newline.
			ret.push_back(line_start);
			ret.push_back(i);
			line_start = i + 1;
			line_end = line_start;
			word_start = line_start;