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fiigii

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If you’ve done serious compiler optimization work on a product with a sufficiently large user base, you’ve almost certainly seen bug reports like this:

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@fiigii Don't worry it exists, they call it PGO, we had it in Visual C++ 2005.

@fiigii Don't worry it exists, they call it PGO, we had it in Visual C++ 2005.

Properties5
typearchive
sourcetwitter
date2026-08-26
tagsarchive, twitter, fiigii
description@fiigii Don't worry it exists, they call it PGO, we had it in Visual C++ 2005.

Aug 26, 20261 min read

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  • URL: https://x.com/amoswap/status/2092620897521725881
  • Author: amoswap (@amoswap)
  • Posted: 2026-08-26 14:31:15

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1/ @amoswap

@fiigii

Don’t worry it exists, they call it PGO, we had it in Visual C++ 2005. Waiting on you GPU guys to stop playing around with OpenGL lightning modes and reinvent that one.

2/ @fiigii

@amoswap

PGO is just another set of heuristic inputs.

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  • If you’ve done serious compiler optimization work on a product with a sufficiently large user base, you’ve almost certainly seen bug reports like this:

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