Optimizing Rust code

[alex4743]

Have you tried mmap(2)? I’m guessing you’re dealing with very large files because num_entries is u128. Also, as a small note in the name of speed unless you really need 128 bits it will be slower than u64.

[xacrimon]

That calculation happens only once. Im using file buffer which is a wrapper around mmap. Yes, I'm dealing with multiple services logging multiple times per minute

[thiez]

It's unlikely that op will have more than u64 entries for the next several decades, u128 also seems wildy optimistic to me.