OMG, he actually loads all the files to temporary buffers and calls it `grep`? And the other text is misguided for the most part and reveals a misunderstanding

OMG, he actually loads all the files to temporary buffers and calls it `grep`? And the other text is misguided for the most part and reveals a misunderstanding of some basic concepts. tumba, please don't use these texts. I second lispm here. Only read these once you have a solid understanding of described concepts yourself.