12-01-2016
The difference you are seeing is probably because your find . -exec grep ..... runs the grep command individually for each file. The use of xargs in my suggestion reduces the number of command calls and therefore the number of process spawned. It may not be the best way, but it works okay.
You might be able to use a + and the end of your -exec section of the find instead of the \;, but it depends on which version of find you have.
Be aware that times may vary depending on the number of files and their sizes, so searching a very few large files may be slow with my suggestion because it will potentially read the files twice.
Glad to have helped a bit this time, but do keep experimenting if the times get longer.
Kind regards,
Robin
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LEARN ABOUT OPENSOLARIS
look
look(1) User Commands look(1)
NAME
look - find words in the system dictionary or lines in a sorted list
SYNOPSIS
/usr/bin/look [-d] [-f] [-tc] string [filename]
DESCRIPTION
The look command consults a sorted filename and prints all lines that begin with string.
If no filename is specified, look uses /usr/share/lib/dict/words with collating sequence -df.
look limits the length of a word to search for to 256 characters.
OPTIONS
-d Dictionary order. Only letters, digits, TAB and SPACE characters are used in comparisons.
-f Fold case. Upper case letters are not distinguished from lower case in comparisons.
-tc Set termination character. All characters to the right of c in string are ignored.
FILES
/usr/share/lib/dict/words spelling list
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu |
+-----------------------------+-----------------------------+
SEE ALSO
grep(1), sort(1), attributes(5)
SunOS 5.11 29 Mar 1994 look(1)