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Is Zgrep faster?
Is fast grep faster? The grep utility searches text files for regular expressions, but it can search for ordinary strings since these strings are a special case of regular expressions. However, if your regular expressions are in fact simply text strings, fgrep may be much faster than grep .
Why is grep so slow?
If you’re running grep over a very large number of files it will be slow because it needs to open them all and read through them. If you have some idea of where the file you’re looking for might be try to limit the number of files that have to be searched through that way.
How do I grep multiple files at once?
To search multiple files with the grep command, insert the filenames you want to search, separated with a space character. The terminal prints the name of every file that contains the matching lines, and the actual lines that include the required string of characters. You can append as many filenames as needed.
Is grep faster than awk?
When only searching for strings, and speed matters, you should almost always use grep . It’s orders of magnitude faster than awk when it comes to just gross searching.
How to make Linux grep from tar.gz faster?
The easiest thing you can do to speed this up would be to uncompress the file first ( gunzip file.tar.gz) and then work on the .tar file. That might help enough by itself. It’s still going to loop through the entire archive N times, though.
What’s the fastest way to grep a file?
Note that grep -l prints the name of any matching file, quits after the first match, and is silent if there’s no match. That alone will speed up the grepping portion of your command, so even if you don’t have the space to extract the entire archive, grep -l will help. If the files are huge, it will help a lot.
How to grep a big file in parallel?
If you have a multicore CPU, I would really recommend GNU parallel. To grep a big file in parallel use: It’s not entirely clear from you question, but other options for grep include: Dropping the -i flag. Setting a max number of matches with the -m flag. Remove the -i option, if you can, case insensitive is quite slow. Replace the . by \\.