and you're not going to say mIRC needs a whole 78mb of RAM to load are you?It doesn't. Not all the time anyway. Here's an example:
I run a mIRC bot in a channel that is able to provide full channel and server defence though most of these scripts are currently turned off as the room already has an "official" bot that provides that protection. The only scripts the bot runs are those relevant to a unique script support function I wrote in. This bot (with mIRC) uses between 3 - 5MB RAM at all times, which I consider good.
I also run my own script. It has all the usual stuff + one or two things that most scripters can't be bothered with like a hardcore channel central dialogue and many functions that use hash tables to store information. Because mIRC V6.03 leaks memory like a sieve when running hash tables the script often chews upto 55MB RAM though usually between 30 - 40 MB, which is still huge. Both run the most recent versions of mIRC, it just depends what you do with it.
See
this noting the 4th from the bottom (my bot) and the last entry (my chat script).