Questions tagged [optimization]
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57 questions
0 votes
1 answer
108 views
Could use docker for app isolation?
I am studying the use of Docker in a big scale project that is actually deployed on production. I never used docker before, but for what I read, it consinst about a new layout called "Container ...
0 votes
0 answers
263 views
PostgreSQL: indexes and partitions
I have a PostgreSQL database and I noticed a weird behaviour while working with indexes and partitions. The engine version is 10.21. Now, I have a table with this structure: guid varchar(50) PK guid_a ...
1 vote
1 answer
225 views
Speed up grep usage inside bash script
I am currently working on creating a bash script that is supposed to process large log files from one of my programs. When I first started the script took around 15 seconds to complete which wasn't ...
- 11
0 votes
1 answer
401 views
Parse huge amounts of files efficiently
I have a folder that holds hunderds of thousands of files called hp-temps.txt. (There are also tons of subfolders) The content of these files looks like this for example: Sensor Location ...
- 111
0 votes
1 answer
884 views
CLI tool that compress the given image, whatever file type the image is (png, jpg, gif, webp, svg)?
I know that there are many tools to optimize an image: pngquant optipng jpegoptim gifsicle exiftool ecc but they are all specific for a certain file type. Is there a single command line that, ...
- 245
1 vote
0 answers
329 views
Pipewire using 2x processes when idling
I recently had my BT headphones stutter and cut out and realized that during CPU intensive processing, pipewire is dropping frames. My overall goal, then, is to streamline processing to make that ...
- 133
1 vote
0 answers
457 views
Can't compile linux kernel with -Og/-O0 option for debugging purpoces
Having custom hardware running embedded Linux (OpenWrt) like a charm. CPU - is IMX6ULL (ArmV7) so it is supported by Jlink to debug over JTAG interface. Starting GDB server and step by step debugging ...
- 111
0 votes
0 answers
218 views
Why integer division is faster than bitwise shift in shell?
I'm comparing performance of bash and dash (default sh in Xubuntu 18.04). I expect sh to be faster than bash I expect bitwise shift to be faster than division operator. However, I'm getting ...
- 1,202
1 vote
0 answers
666 views
Is jq internal sort slower than GNU sort?
While filtering through this json file I did a benchmark and found out utilizing jq's internal sort and unique method is actually 25% slower than sort --unique! Command Mean [ms] Min [ms] Max [ms] ...
- 1,202
1 vote
2 answers
714 views
How to Build Latest HandBrake on linux with FDO (PGO) + LTO?
Passing CFLAGS and CXXFLAGS to a HandBrake build for the latest version (v1.3.3 at the time of this writing) will work until you add -flto which will FAIL the whole build. How to build HandBrake with ...
- 262
1 vote
0 answers
62 views
How can I frequently update a file without harming my disk?
I've got an i3 install on a laptop with an SSD. Currently I have it configured to save the WM layout on many different events. The tool that I'm using to do this is built on Python, and I'm just ...
- 11
-1 votes
2 answers
57 views
Optimize time when creating archive
Currently I am using the following command to create an archive with files older than 7 days: find /var/tunningLog/ -type f -mtime +7 -print0 | tar -czf "/var/tunningLog/$(date '+%Y-%m-%d').tar....
- 379
1 vote
1 answer
328 views
Optimal command-line search inside a sorted text file
Let's say I have a text file with billions of text lines sorted alphabetically, like Bar=10 Foo=6 Naz=42 How can I search for the line starting with Foo in the most optimal way (the file contains ...
- 127
4 votes
1 answer
417 views
Is there an equivalent to Jason Randolph's Super Duper mode vim re-mapping for Linux?
I'm very interested in moving from my Mac to a Linux system. The main barrier is my dependence on Jason Rudolph's Keyboard. Specifically, I need an equivalent to (S)uper (D)uper Mode. Super Duper ...
- 41
3 votes
1 answer
1k views
How to pipe output of command to two separate commands and store outputs
I have a really long command that runs over a huge file and I am forced to run it twice which doubles the time it takes to run. This is what I am doing at the moment: x=$(command | sort -u) y=$(...
- 35