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Polar H9：56.44美元，原价69.90美元（此型号仅支持单设备蓝牙连接，可满足多数需求）。
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When we started working on using zram on Quest (since it runs on Android, which makes use of zram), one problem we ran into was vm.page-cluster: it defaults to 3, meaning the kernel reads 2^3 pages at once from swap as a readahead optimisation. When reading from disk, that's sensible: pages near each other on disk tend to be needed near each other in time, so it's good to amortise. But with zram, this assumption no longer holds at all, and in fact works against you quite considerably. With zram, compressed pages have no locality, so you're paying for 8 swap-ins every time you need 1. Importantly, this is neither something specific to Quest, nor vm.page-cluster, it's more a consequence of the kernel treating zram like any other block device. vm.page-cluster is at least tunable, but there are other assumptions baked into the kernel that aren't even exposed as sysctls. In many cases the kernel will fight against you, and it takes a lot of effort and knowledge to get this right.
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