queue-runner: release machine reservation while copying outputs #1469
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This allows for better builder usage when the queue runner is busy. To avoid running into uncontrollable imbalances between builder/queue runner, we only release the machine reservation after the local throttler has found a slot to start copying the outputs for that build. As opposed to asserting uniqueness to understand resource utilization, we just switch to using `std::unique_ptr`.
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This allows for better builder usage when the queue runner is busy. To avoid running into uncontrollable imbalances between builder/queue runner, we only release the machine reservation after the local throttler has found a slot to start copying the outputs for that build.
As opposed to asserting uniqueness to understand resource utilization, we just switch to using
std::unique_ptr.