Arnab Ray
@arnabray.bsky.social
Software Engineer @Groww. Previously at Udaan and Flipkart.
Distributed systems, programming languages, maths, painting.
Distributed systems, programming languages, maths, painting.
Reposted by Arnab Ray
Some other material on this subject.
October 19, 2025 at 12:00 PM
Some other material on this subject.
Reposted by Arnab Ray
MMAP is incredibly fast when the dataset fits in memory, but it slows to a crawl when it doesn't, especially if the workload is mostly random point lookups. Speaking as someone who built an MMAP-based key-value store before :) Obligatory paper from @andypavlo.bsky.social db.cs.cmu.edu/mmap-cidr2022/
October 11, 2025 at 3:39 PM
MMAP is incredibly fast when the dataset fits in memory, but it slows to a crawl when it doesn't, especially if the workload is mostly random point lookups. Speaking as someone who built an MMAP-based key-value store before :) Obligatory paper from @andypavlo.bsky.social db.cs.cmu.edu/mmap-cidr2022/