> I don't think your search string is sufficient for a test. > With 'aaa' it actually knows that it only needs to look at the > first three characters of a. Imho you need to try something > like liketest(a,'%aaa%').
Ok. I ran the modified test (now the iteration is reduced to 100000 in liketest()). As you can see, there's huge difference. MB seems up to ~8 times slower:-< There seems some problems existing in the implementation. Considering REGEX is not so slow, maybe we should employ the same design as REGEX. i.e. using wide charcters, not multibyte streams... MB+LIKE Total runtime: 1321.58 msec Total runtime: 1718.03 msec Total runtime: 2519.97 msec Total runtime: 4187.05 msec Total runtime: 7629.24 msec Total runtime: 14456.45 msec Total runtime: 17320.14 msec Total runtime: 17323.65 msec Total runtime: 17321.51 msec noMB+LIKE Total runtime: 964.90 msec Total runtime: 993.09 msec Total runtime: 1057.40 msec Total runtime: 1192.68 msec Total runtime: 1494.59 msec Total runtime: 2078.75 msec Total runtime: 2328.77 msec Total runtime: 2326.38 msec Total runtime: 2330.53 msec -- Tatsuo Ishii ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])