### 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);
	return fd->msdf_source_size;
}
void TextServerFallback::_font_set_fixed_size(const RID &p_font_rid, int64_t p_fixed_size) {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->fixed_size = p_fixed_size;
}
int64_t TextServerFallback::_font_get_fixed_size(const RID &p_font_rid) const {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->fixed_size;
}
void TextServerFallback::_font_set_allow_system_fallback(const RID &p_font_rid, bool p_allow_system_fallback) {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND(!fd);
	MutexLock lock(fd->mutex);
	fd->allow_system_fallback = p_allow_system_fallback;
}
bool TextServerFallback::_font_is_allow_system_fallback(const RID &p_font_rid) const {
	FontFallback *fd = font_owner.get_or_null(p_font_rid);
	ERR_FAIL_COND_V(!fd, false);
	MutexLock lock(fd->mutex);
	return fd->allow_system_fallback;
}
void TextServerFallback::_font_set_force_autohinter(const RID &p_font_rid, bool p_force_autohinter) {