Which registers are safe, control questions

[jj2007]

The "szappend" is a lot more efficient with streamed appends as it uses a current location pointer to update the next write address.

Is it faster than szMultiCat?

[hutch--]

They are slightly different animals, the multicat algo will take a number of arguments and for that count it is fast enough but if you are stream appending a very large count to a buffer, the append algo avoids the length scan as it returns the end position of the last write and the next write starts at the end of the last write.