Both functions are supported by PHP 4 and. Yes of course, in my bash script I add 'sleep 1', in some lines, but script run very slowly, so after some conclusion I calculate that sleep 0.1 also bring good results and more faster About the delay, I need delay in order to solve the ssh problem in my bash script, I perform paralel ssh login to some machines by expect and without delay. Solaris 11 sleep does support fractional seconds.Īs a last resort you could use perl (or any other scripting that you have to hand) with the caveat that initialising the interpreter may be comparable to the intended sleep time: $ perl -e "select(undef,undef,undef,0. The sleep() function will delay the scripts execution in seconds while usleep() will delay it in microseconds. Note To execute the function only once, use the setTimeout () method instead. The setInterval () method continues calling the function until clearInterval () is called, or the window is closed. The usleep() function delays execution of the current script for a specified number of microseconds (a microsecond equals one millionth of a second). A good way to implement this is by using the function - obimplicitflush() then you don't need to use flush() function explicitly. The POSIX sleep command is minimal, older Solaris versions implemented only that. Definition and Usage The setInterval () method calls a function at specified intervals (in milliseconds). php sleep() doesn't work at all - Dev Talk, This is a critical thing to use time delay function as sleep() Because a beginner can find that this is not working and he/she will see that all output appearing at a time. If that's not suitable, the next easiest thing to do is build or obtain sleep from GNU coreutils, this supports the required feature. If and when it is set correctly you need only enable -f filename commandname as required.) In less than the time it took you to write this, you could have copied the contents of script.php, pasted it twice more, hardcoded the start and end values in each section, and added a sleep (5) between each copy/paste. (The man page implies BASH_LOADABLES_PATH is set automatically, I find this is not the case in the official distribution as of 4.4.12. Unless your distro/OS has done something creative (sadly RHEL/CentOS 8 build bash-4.4 with loadable extensions deliberately removed), you should be able to do instead: &īASH_LOADABLES_PATH=$(pkg-config bash -variable=loadablesdir 2>/dev/null) The downside is that the loadables may not be provided with your bash binary, so you would need to compile them yourself as shown (though on Solaris it would not necessarily be as simple as above).Īs of bash-4.4 (September 2016) all the loadables are now built and installed by default on platforms that support it, though they are built as separate shared-object files, and without a. $ time (for f in `seq 1 10` do builtin sleep 0.1 done) Bash has a "loadable" sleep which supports fractional seconds, and eliminates overheads of an external command: $ cd bash-3.2.48/examples/loadables
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