"Ripgrep – A new command line search tool" https://news.ycombinator.com/item?id=12564442 (740 points | Sept 23, 2016 | 209 comments) - there are discussions related to speed too

"Ripgrep is faster (2016)" https://news.ycombinator.com/item?id=17941319 (98 points | Sept 8, 2018 | 40 comments)