Viewing profile — romka2

You can use powerlevel10k with the default system font. It works fine with urxvt without any twiddling.

The minor modification would be from `$opts` to `$=opts`. I'd been using ZSH for a year as if it was Bash with better history and much better completions. The difference mentioned …

Pro tip: s/powerlevel9k/powerlevel10k/. Same config, same theme, but much faster.

I remember reading this article back when I was still using Bash. I've finally got the history I like only after switching to ZSH. You can get decent history in ZSH just by setting…

This format looks somewhat underpowered. If one record is corrupted, there is no way to read anything after it. For the same reason there is no lookup/sharding support, such as fin…

RecordIO supports a form of random access lookup, although it's rarely used. Riegeli supports random access lookups as a first-class operation.

> That appears to be exactly RecordIO. I suppose you mean "exactly" in a figurative way. Riegeli is definitely inspired by RecordIO and is meant as a successor to it but it's not R…

There is no listed equivalent of RecordIO. What do people use for high-reliability journals? When I needed something like RecordIO to store market data, I couldn't find anything. S…

What part of the code do you expect to get faster with `-march=sandybridge -mtune=sandybridge`? > excessive ASM is a mistake these days There is no ASM in the article.

I would agree with this sentence if "optimizing" were replaced with "making marketing claims". Optimization is the process of finding the fastest implementation. In the case of Lis…

No, I did the opposite. I made sure the disk caches are warm before each benchmark. Since all versions of ListDir are identical in terms of IO demands, warming up caches is an effe…

I've posted some details explaining why gitstatusd doesn't use inotify in https://github.com/romkatv/gitstatus/commit/050aaaa04b652e15... . The short version is that the default ma…

nftw is a wrapper over opendir/readdir, not the other way around.

Yep, this is mentioned in the doc. > [...] every element in entries has d_type at offset -1. This can be useful to the callers that need to distinguish between regular files and di…

Yep, every string is potentially an allocation (unless it's short and std::string implements Small String Optimization) plus O(log N) allocations by the vector itself. C++11 didn't…

gitstatusd calls ListDir in parallel from multiple threads. At least with a fast SSD it's CPU bound. I don't have an HDD to test on.

That's a cool algorithm. The improvements in the article look pretty small between different versions because CPU time is dominated by system calls that are out of my control. If y…

> [...] have you tried core.fsmonitor with the watchman hook? I read the docs but it seems like it's not something I can enable on users' machines. Or maybe there is a way to take …

This directory-listing code only executes on a "cold" run of gitstatusd, which happens when you `cd` into a repo for the first time. Users obviously can tolerate higher prompt late…

The real implementation of ListDir accepts the descriptor of the directory it needs to list (not parent_fd plus dirname like it's done in the article) and doesn't close it. This is…

You are quoting a self-deprecating joke. I care deeply about my code being readable, which can be quite challenging when writing high-performance code close to the metal. I'm self-…