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Your frustration is valid, but that is the purpose of writing obfuscated programs. Anyways I think we have beaten this dead animal far too much. It'd have been nice to put the comparison operator instead of the assignment one but since the latter evaluates to true for each line, they're all printed.

There is nothing wrong with the script below, save that it is an example of obfuscated awk scripting. A = "a" B = "b" { } END { print A, B } Moreover, it is semantically different from the script that you've posted although it looks syntactically similar to the one you're talking about.

Here's a different awk recipe: awk -F"[\t]|[(]|[)][,]?" '{ for (i=1;i<=NF;i++) x[$1] = (i==1 ? $1 : (i%2 ? x[$1] ";" ($i > 0.8 ? $(i-1) : "low") : x[$1])) n=split(x[$1],a,";") for (j=n;j<5;j++) x[$1]=x[$1]";na" } END {for(i in x) print x[i]}' file

See if this awk command will work for you: awk '{c[$2]++;l=$0;gsub("^[0-9]+ *[0-9]+ *","",l);pid[$1]=l;ppid[$2]=(ppid[$2]?ppid[$2] " " l : l)}END{for(i in ppid) if (i in pid) {pid[i] = pid[i]" "ppid[i];print i, pid[i]}}' file

Time calculations are normally best done in perl due to its builtin libraries, but that is just my 2c...

Try forcing a numerical output by... nawk '{if (NR==2) print $NF+0}']