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Sesse__
on March 6, 2023
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Show HN: Faster FastAPI with simdjson and io_uring...
0.2% really isn't free. If you have a data set of 10 TB (one small-ish HDD right now, or one large SSD), that's ~20 GiB in page tables alone. If you can use 2MB pages, then sure, but I would assume that also limits your page-in granularity.
loeg
on March 6, 2023
[–]
Oh, you're right. I wasn't remembering we needed PTEs to cover the data not paged in as well as the data in RAM. Sorry.
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