# Seemingly permanent performance degradation after fiddling with command-line options

**URL:** https://discourse.julialang.org/t/seemingly-permanent-performance-degradation-after-fiddling-with-command-line-options/12944
**Category:** Performance
**Tags:** bug
**Created:** [August 6, 2018, 3:43pm UTC](https://discourse.julialang.org/t/seemingly-permanent-performance-degradation-after-fiddling-with-command-line-options/12944 "2018-08-06T15:43:06Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![nstgc](https://avatars.discourse-cdn.com/v4/letter/n/e0b2c6/32.png) [@nstgc](https://discourse.julialang.org/u/nstgc)
#### Post date: [August 6, 2018, 3:43pm UTC](https://discourse.julialang.org/t/seemingly-permanent-performance-degradation-after-fiddling-with-command-line-options/12944/1 "2018-08-06T15:43:06Z")

</div>

Yesterday evening I was working on trying to speed up some functions. Most I was tweaking the regex which provided a 13% speed boost. In an attempt to get more out of it I tried running Julia with different options. Namely `--compile`, largely out of curiosity. Everything I tried was slower, even when I returned it to “normal” meaning no options given.

I then gave up. Now I’m back at it and noticing that it is indeed slower, even after a reboot, and the memory usage is outrageous. What was using less than 700kb of memory is now using nearly 5.5MB (both after compiling)! Wondering if I might have introduced some kind of regression, I rolled back to various tagged points in my repo with similar results.

How I’m timing this is by loading the REPL with “julia” in terminal and `include("path/to/my/script.jl")` and running `@time function("path/to/same/file/as/yesterday.tex")` and reading off the time. I’m using the julia package from the official Arch repo. As far as I can tell between yesterday and today nothing was updated that should have caused performance degradation like this. The following were updated last night. (What I put up in my original opening post ISN’T what I updated last night. I’m not sure was since /var/log/packman.log is only showing that only `yay` was upgraded, which I don’t think is right.)

The only think of is that somehow, something I did last night stuck and isn’t changing back. It shouldn’t. I didn’t mess with any config files, just command line options.

I tried moving ~/.julia to a new location but this didn’t help.