How to get word offset all instances of a string in a chunk of text?

[hh]

For a more general context see

http://www.runrev.com/pipermail/use-livecode//2004-February/032280.html

Sadly LC 9 is at about 10 times slower than LC 6 with such fast scripts.
For example LC 6.7.11 needs at about 500 ms to evaluate a 1 MByte string,
LC 9.0.0 needs at about 5 seconds.