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How to extract img src, title and alt from html using php? [duplicate]
...ar image"
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[..]
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Regexps are CPU intensive so you may want to cache this page. If you have no cache system, you can tweak your own by using ob_start and loading / saving from a text file.
How does this stuff work ?
First, we use preg_ match_ all, a fun...
How to gzip all files in all sub-directories into one compressed file in bash
... other compressors. For example pigz which is faster as it can utilize the cpu better(a multi-threaded implementation of zip).
– Ortwin Angermeier
Dec 4 '14 at 17:54
add a com...
Powershell equivalent of bash ampersand (&) for forking/running background processes
...e pwsh &
Receive-Job $job
Output
NPM(K) PM(M) WS(M) CPU(s) Id SI ProcessName
------ ----- ----- ------ -- -- -----------
0 0.00 221.16 25.90 6988 988 pwsh
0 0.00 140.12 29.87 14845 845 pwsh
0 0.00 85.5...
Is optimisation level -O3 dangerous in g++?
... more machine code being generated. Under certain circumstances (e.g. on a cpu with exceptionally small L1 instruction cache) this can cause a slowdown due to all the code of e.g. some inner loop now not fitting anymore into L1I. Generally gcc tries quite hard to not to generate so much code, but si...
Why does Google prepend while(1); to their JSON responses?
...phic evaluation server-side. At Google scale, that would require a lot of CPU. This sort of offloads it to the client.
– bluesmoon
Feb 5 '13 at 6:10
98
...
How to break out of a loop from inside a switch?
... asked me to make the main loop let other threads (or processes) have some CPU time, two solutions come to mind:
Option #1
Readily insert the pause:
while( isValidState() ) {
execute();
sleep();
}
Option #2
Override execute:
void execute() {
super->execute();
sleep();
}
This code...
When to use Task.Delay, when to use Thread.Sleep?
...
Or when you don't want to chew up CPU in a main loop.
– Eddie Parker
May 20 '14 at 21:23
5
...
What is the best way to concatenate two vectors?
... for low iteration count. This assumes a good vector implementation, plus CPU instruction pipeline & [good] branch prediction, but those are pretty reliable assumptions for a modern toolchain and desktop machine. Don't know about smartphones though..
– boycy
...
Node.js or Erlang
...ngle-threaded environment. So it's great at dispatching but not so good at CPU-intensive processing. To cover that ground you can fork off another process/thread that runs native C/C++ code. If all you're doing is async IO calls (ex IPC | bi-directional pipes) then node.js should be able to handle t...
Timeout a command in bash without unnecessary delay
...choose a polling interval. And if you set the polling too low, it will eat CPU with constant signaling, making the tlrbsf run even longer!
– system PAUSE
Mar 27 '09 at 0:28
8
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