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# 15  
Old 06-07-2007
Quote:
Originally Posted by matrixmadhan
This is surprising me ! Smilie Smilie Smilie

I tried with 600 MB file
though the time taken to compute number of lines were different

result were unique for each of the commands.
My test file was the result of the concatenation of all files of a directory.
The directory contains text and binary files, so my test file contains also binary data. I think that the awk doesn't like binary datas.

I made a test to confirm this fact:
Code:
$ tar cvf test.tar test.dat
a test.dat 4009 blocs.
$ wc -l test.dat
   60636 test.dat
$ sed -n $= test.tar
$ awk END {print NR} test.tar
60842
$

As you can see, the result is different for the three commands.


Jean-Pierre.
# 16  
Old 06-07-2007
Quote:
As you can see, the result is different for the three commands.
I suppose wc -l uses ' \n ' as the line delimiter and counts the number of lines based on the occurence of the delimiter ' \n ' from the file.

I have seen files for which ' \n ' is not the default delimiter in that case even wc will not give the result as expected.

So should be the case with awk and binary files.
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