Timeline for answer to Why there is such a difference in execution time of echo and cat? by Chris Davies

9 events

when toggle format	what		by	license	comment
Sep 17, 2015 at 8:19	comment	added	Chris Davies		@mohammad.k Please just quote your variables and try it again.
Sep 17, 2015 at 8:15	comment	added	Mohammad		@roaima :What does the command `tar cf - \| dd bs=1M count=50` do? Does it make a regular file with same characters inside it? If so, in my case the input file is completely irregular with all kind of characters and whitespaces. And again, I used `time` as you have used, and the result was the one that I said: 54 seconds vs 3 seconds.
Sep 17, 2015 at 8:07	comment	added	Chris Davies		@mohammad.k for the third time: if you quote your variables, the problem goes away.
Sep 17, 2015 at 8:05	history	edited	Chris Davies	CC BY-SA 3.0	Formatting. Duh
Sep 17, 2015 at 8:02	comment	added	Mohammad		@fpmurphy1 :No. I tried my code. The loop runs only twice, not 10 times.
Sep 17, 2015 at 7:26	comment	added	Mohammad		I did as you said, but the problem has not been solved. `cat` is very, very faster than `echo`. The first script runs in an average of 3 second, but the second one runs in an average of 54 seconds.
Sep 17, 2015 at 7:06	comment	added	fpmurphy		Actually the loop runs 10 times, not twice.
Sep 17, 2015 at 6:56	history	edited	Chris Davies	CC BY-SA 3.0	Additional explanation
Sep 17, 2015 at 6:26	history	answered	Chris Davies	CC BY-SA 3.0