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Do HTML WebSockets maintain an open connection for each client? Does this scale?
...d to log the start and completion of every HTTP request taking up disk and CPU time. It will become standard to log the start and completion of WebSockets data, but while the WebSockets connection doing duplex transfer there won't be any additional logging overhead (except by the application/service...
memory_get_peak_usage() with “real usage”
...
<!-- Print CPU memory and load -->
<?php
$output = shell_exec('free');
$data = substr($output,111,19);
echo $data;
echo file_get_contents('/proc/loadavg');
$load = sys_getloadavg();
$res = implode("",$load);
echo $res;
?>
...
Is there any way to put malicious code into a regular expression?
... states at the same time, and backtracking can eat your lunch — and your CPU.
Denial‐of‐Service Solutions
Probably the most reasonable way to address these patterns that are on the losing end of a race with the heat‐death of the universe is to wrap them with a timer that effectively places...
How does password salt help against a rainbow table attack?
... scrypt, bcrypt, and PBKDF2 are good choices and more than worth the extra CPU cycles on the server IMHO. Argon2 is currently the state of the art, but not as battle-tested as the others.
– kgriffs
Oct 6 '15 at 17:47
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...es. Consider strings such as:
ps_aux_header = "USER PID %CPU %MEM VSZ"
patient_header = "name,age,height,weight"
When asked to break these strings into fields,
people tend to describe both using the same English word, "split".
When asked to read code such as fields = line.sp...
Difference between std::system_clock and std::steady_clock?
...s the program required (independent of other processes running on the same CPU). Better yet, get your hands on a real profiler and use that.
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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
... In todays world, Data Execution Prevention doesn't even allow the CPU to fetch an instruction from the heap. This answer is outdated since XP SP2.
– MSalters
Apr 5 '17 at 8:27
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How do browsers pause/change Javascript when tab or window is not active?
...stribution: setInterval vs requestAnimationFrame
Note: This test is quite CPU intensive. requestAnimationFrame is not supported by IE 9- and Opera 12-.
The test logs the actual time it takes for a setInterval and requestAnimationFrame to run in different browsers, and gives you the results in the ...
Why does direction of index matter in MongoDB?
...up a level and down the next branch. It's O(n) Out of order it's much more CPU intensive.
– Jared Kells
Apr 26 '12 at 11:53
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How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
...GURG I High bandwidth data is available at a socket.
SIGXCPU A CPU time limit exceeded.
SIGXFSZ A File size limit exceeded.
BusyBox init
BusyBox's 1.29.2 default reboot command sends a SIGTERM to processes, sleeps for a second, and then sends SI...