Build
In macOS:
svn checkout https://svn.webkit.org/repository/webkit/trunk WebKit
cd WebKit
./Tools/Scripts/build-webkit --debug
./Tools/Scripts/run-safari --debug
Notes:
svn checkout
require over 30 minutes.
$ time svn checkout https://svn.webkit.org/repository/webkit/trunk WebKit
...
...
Checked out revision 287679.
svn checkout https://svn.webkit.org/repository/webkit/trunk WebKit 238.83s user 1058.14s system 65% cpu 33:05.45 total
./Tools/Scripts/build-webkit --debug
require 1h over.
Using 2.9 GHz 6-Core Intel Core i9, RAM 32GB, macOS Big Sur 11.6, MacBook Pro.
$ time ./Tools/Scripts/build-webkit --debug
...
...
====================================================================
WebKit is now built (1h:08m:46s).
To run Safari with this newly-built code, use the
"Tools/Scripts/run-safari" script.
====================================================================
./Tools/Scripts/build-webkit --debug 28444.70s user 2064.79s system 737% cpu 1:08:54.33 total