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Re:How Mailinator compresses its email stream by 90% by markbao on Tuesday February 21, 2012 @01:39PM (#3617534)
Great read. I wish there were more articles like these.
Re:How Mailinator compresses its email stream by 90% by fleaflicker on Tuesday February 21, 2012 @01:49PM (#3617569)
Then rest of the mailinator blog and his blog (http://paultyma.blogspot.com/) are filed with gems like this.

There are a few of entries on multi-threaded synchronous io vs asynch io; he's a big proponent of the former.