Did you also test Windows inbuilt Find utility?
No, I don't use that, but I tried my file manager Total Commander now,
it took 6 minutes and it found 2041 files, probably because it can open
more
types of compressed files.
Okay, I'll try windows find too. In win98se.
I see no "search inside compressed archives" option here.
It took 5 min, and found 871 files containing the string utopia.
Considering that TC searched inside more compressed files and found a
lot more files it is both the fastest and the best. I have written
about utopia for many years, it is my plan for a better society, and I
have compressed older texts using compressors like arj and zip.
Now I tried TC without "search inside compressed archives".
It took 3-4 minutes and found 871 files.