Question

I have two files which both follow the same pattern:

TEST CASE 1:  0.004 seconds
TEST CASE 2:  0.043 seconds
TEST CASE 3:  0.234 seconds
TEST CASE 4:  0.564 seconds
....

What I’m trying to do is calculate the speedup for each test case, which is done by taking the
value from one file and dividing it with the corresponding value in the other file.

Is there a simple way of doing that using awk?

Answer 1

I managed to come up with my own solution by using paste to merge the two result files. Then the awk script became really simple, and the test cases are sorted correctly.

paste <(grep "^TEST CASE" file1) <(grep "^TEST CASE" file2) |
awk '{print "TEST CASE " $3 "  " $4 / $9}'

The grep is there to get the expected input to paste as the lines are taken from a file which contains a lot of other information that I don’t want. If the expected output is already available in a separate file (as I stated in the question), then the command becomes

paste file1 file2 | awk '{print "TEST CASE " $3 "  " $4 / $9}'

This gives as output:

TEST CASE 1:  1.0423
TEST CASE 2:  2.34023
TEST CASE 3:  3.2423
TEST CASE 4:  4.3425
....