From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <0203c3ac75cd0cbf6c419953cd7401cd@plan9.bell-labs.com> To: 9fans@cse.psu.edu Subject: Re: [9fans] GUI toolkit for Plan 9 From: "rob pike" MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Tue, 26 Feb 2002 09:24:32 -0500 Topicbox-Message-UUID: 563c1080-eaca-11e9-9e20-41e7f4b1d025 > Speed is really important, of course, but it's usually thought that > this is the reason why we want optimizing compilers. Ten percent buys you, what, a couple of weeks of Moore's Law? I'm not against fast compilers - I'm actually rather impressed by good compilers - but I do fret about optimizing compilers breaking my code. Fancy optimizers have fancy bugs. I'd happily give up the 10% or 20% those 25,000 lines of code on the MIPS give me if I knew that would reduce the probability of bugs. On Plan 9, the code optimizer is enabled by default. It's been years since I turned it off (8c -N) to see if the optimizer was breaking my code, and much longer than that since it did. -rob