Re: NvP: s.add('x') 100M times

[HashBackupJim]

Thanks for the tip. I knew about this sizing trick for tables, and it did save 
a lot of RAM ina small test (large table) because it avoided resizes, but 
wasn't aware strings had a similar thing. I read the Nim manual, but stuff only 
sticks when doing a lot of coding in a new language and I'm not there yet.