I'd guess they'd run in firecracker VMs (a technology they open sourced), targeting faster starts. And perhaps turning off the compile time flags also results i

I'd guess they'd run in firecracker VMs (a technology they open sourced), targeting faster starts. And perhaps turning off the compile time flags also results in a faster-starting binary, which is the more important metric for serverless, maybe at the expense of slower code/longer runtime, excepting that runtimes are on average quite short anyway.