Parallelize workload pack downloads Fixes #43870 #45969
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Fixes #43870
There are multiple possible reasons AzDO might be much slower than nuget.org. My untested hypothesis is that it may be some authentication work, which would be substantially mitigated by parallelizing the workload pack downloads (not the installs). That's what I tried to do here.
@AArnott, any chance you could try this out and let me know if it helps?