A web_find and web_reg_find does the same. They find for a text in a returned HTML page. But the difference is a web_find finds the text while the complete page data is served where as a web_reg_find does it while the data is being returned. In the first case, checking for a text in a data after being returned is a wasted time in the transaction or script execution. web_reg_find does this more efficiently while data is being returned. Hence, the old web_find was deprecated.