[webkit-dev] Offline Assembler build step always computes hashes even when nothing changes

Darin Adler darin at apple.com
Sun Sep 16 20:48:10 PDT 2018

> On Sep 16, 2018, at 5:59 PM, Filip Pizlo <fpizlo at apple.com> wrote:
> Which offline assembler build step are you referring to?

The one that is the “Offline Assembler” target in Xcode, which runs this command:

ruby JavaScriptCore/offlineasm/asm.rb JavaScriptCore/llint/LowLevelInterpreter.asm "${BUILT_PRODUCTS_DIR}/JSCLLIntOffsetsExtractor” LLIntAssembly.h

For a “nothing rebuild” of all of WebKit and all of Safari for iOS on my iMac, it takes about 10 seconds out of a 30 second total “build" time.

Looking more carefully at the build log now, it seems that recompiling LLIntOffsetExtractor.cpp is also taking multiple seconds. Not executing generate_offset_extractor.rb, but compiling the output.

— Darin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-dev/attachments/20180916/6d8c446f/attachment.html>

More information about the webkit-dev mailing list