- /* Pretty smart algorithm here: ignore first eight bytes of the
- * collation key. It doesn't produce results equivalent to
- * UCCompareCollationKeys's, but the difference seems to be only
- * that UCCompareCollationKeys in some cases produces 0 where our
- * comparison gets -1 or 1. */
-
- if (key_len * sizeof (UCCollationValue) <= 8)
+ /* The first codes should be skipped: the same string on the same
+ * system can get different values at runtime in those positions,
+ * and they do not sort correctly. The exact size of the prefix
+ * depends on whether we are building 64 or 32 bit.
+ */
+ if (key_len <= start)