The Unsettling Power of GNU Coreutils
Description
A two-part meme. The top part is a screenshot of a Stack Exchange answer, specifically a comment thread. The accepted answer suggests using the 'shuf' command. One of the comments, highlighted by its repetition and the meme's focus, reads: 'shuf is fantastic. I tried in on a 78 Billion line text file and it did the job in less than 1 minute. -- Ash Jan 19 '16 at 8:13'. The bottom part of the image uses the 'The What' meme format, featuring a woman with a confused and slightly disturbed expression that zooms in to an extreme, distorted close-up. This meme captures the disbelief and shock of a developer encountering a command-line tool that can process an absurdly large file - 78 billion lines - with impossible speed. It's a humorous take on the surprising and sometimes frightening efficiency of fundamental, low-level utilities that most developers rarely push to their limits
Comments
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The difference between a junior and a senior dev is that the junior is amazed 'shuf' can handle a 78 billion line file, while the senior is just wondering what kind of unindexed, unpartitioned monstrosity they've inherited this time
“shuf did 78 billion lines in under a minute” is right up there with “our monolith is stateless” - works perfectly as long as the data lives on /dev/null and the laws of physics are behind a feature flag
Somewhere a data engineer is explaining to their manager why they need a distributed computing cluster when a 40-year-old Unix utility just outperformed their entire Spark pipeline on a single core
When someone claims they processed 78 billion lines in under a minute with shuf, the entire Unix community collectively raises an eyebrow. Either they've discovered a quantum computer running in their terminal, or someone's confusing 'lines processed' with 'CPU cycles wasted waiting for sort -R to finish.' The real performance optimization here is how quickly the community can deploy the 'WHAT' meme to express their technical disbelief
If your shuf processes 78B lines in under a minute, you didn’t benchmark the CLI - you invented faster‑than‑light storage; the rest of us stick to reservoir sampling and reality
Love that 'shuf -n' answer - especially the comment about 78B lines in under a minute; finally, a benchmark more random than the sample
Big data win: grep's O(1) lookup on the OP's self-descriptive header beats reservoir sampling every time