Take https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/271196/steps/archive_webkit_tests_results for example (though it's far from the only one)

As of this writing, it has been running for 18 minutes and is not yet done.

This compares with a webkit_tests step which took 33 minutes. Uploading the result takes more than half the time of running the tests! Surely there's a way to optimize that? I find that usually the bots with the layout tests are on the critical path to getting my CL landed, so this is would be very useful for me.