document --shm-size and --cpus for consistent results #373
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patrickhulce
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Jul 7, 2020
denkrasnov
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Related to GoogleChrome/lighthouse#9307
lighthouse fails to get results of heavy content pages if chrome has limited docker shared memory.
Using --shm-size=2g fixes this issue.
Another advice about using --cpus to control the CPU available to the lighthouse.
I also want to include advice to run a single test at a time on a dedicated machine to ensure equal CPU cycle availability between tests. This leads to the most consistent results but this seems infeasible in most cases. Scenarios like web.dev and page speed insight will have exponential hardware costs if they go this way. We are doing this at housing.com which has limited resource requirements. Please advice.