Questions tagged [optimization]
The optimization tag has no usage guidance.
60
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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 ...
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4
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1
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362
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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
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605
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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=$(command | sort -u)
y=$(...
- 25
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KSM / MADVISE : Init & usage in standard desktop environment
Running a 4.19 linux kernel + couple of patches RT oriented + occasionally running a couple of processes SCHED_RR (for "pro"-audio purposes)
CONFIG_KSM set in the kernel and ksmd running, I ...
- 8,249
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Build the Linux kernel without gcc optimization
I follow one of many tutorials found on Google results to build and debug the Linux kernel with gcc and kgdb/gdb. And I end up by discovering that is all waste of time. Since I can't compile the ...
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Timing desktop environment initialization
Is there a way to time desktop environment initialization and perhaps identify delaying candidates?
- 107
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270
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Why don't BSD kernels use likely() unlike Linux does?
As pointed out in an answer, there's some use of similar hints to compiler in say, FreeBSD and OpenBSD, but those hints coverage of Linux kernel code is a few magnitudes higher. It might make sense to ...
- 6,280
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175
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How to resize images on sequential functions?
I am trying to:
change the format of my images,
then resize their height and width of 40%
then optimize their quality to 35% max of the source and the total size of the image to 35% of the origin.
...
- 503
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54
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Optimize raid drive for disk read
I have a Hardware RAID10 setup at home for my home server. I run a Plex Media server and a Nextcloud cloud server for my family at home. My concern is, that when I am downloading a movie (heavy disk ...
- 101
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1k
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Can I compile Linux kernel with -Ofast?
I want to know if compiling the Linux kernel with -Ofast is:
Worth it.
Supported (what level of optimization do the kernel writers take into account?)
Secure.
The question arised because ...
-1
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1
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735
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What are all the possible optimizations I could apply to a new build of Gentoo? [closed]
With the assumption that I'm using hardware with a very modern CPU (9900K), what are all the possible optimizations I could apply to a new build of Gentoo in order to gain the best possible ...
- 485
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415
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how do I emerge gcc 9 on gentoo without creating too many processes?
I am stuck on building gcc 9 with lto USE flag, because it is creating over 30 lto processes when I try to do so. At this point, I have to reboot my PC. I think it may have to do with the new lto ...
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2
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2k
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Is it safe to disable clamscan and clamd services on linux server
We have a dedicated CentOS server with 8 CPUs. We often observe clamscan and clamav taking too much CPU. I have heard experts saying linux doesn't require an antivirus. If that is true, is it safe to ...
- 187
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545
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Speed up random sort and delete (rm) for multiple directories
Running MacOS in a terminal which is essentially BSD, hence posting my question here instead of askdifferent. I want to trim my image dataset down in subsequent steps, by deleting files randomly. Some ...
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Compile a library aiming to reduce size as much as possible
I have to 'squeeze' all the needed code to run ldaps on an embedded system. So the 3 MiB of lybcrypto and almost 700KiB of libssl are way too much.
I'm now experimenting on ldapsearch because reading ...
- 333