On 11/10/12 08:54, David Anderson wrote:
Keep in mind that debug builds are probably at least an order of magnitude slower (or a large factor), whereas PGO is a very small factor. (After all, we do not PGO on Mac and it doesn't seem to be a problem.)
5-20%, if it were a general slowdown, is _huge_. We have people who work for months to get speedups of 1 or 2%.
We should find out whether the Linux distros are using PGO. If they are, it would be unwise for us to stop supporting their release configuration, and tell them that the new supported configuration is a lot slower...
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