There are many previous submissions and discussions on the fast inverse
square root hack going back many years, but it's still fun to see it.<p><a href="https://news.ycombinator.com/item?id=203676" rel="nofollow">https://news.ycombinator.com/item?id=203676</a><p><a href="https://news.ycombinator.com/item?id=213056" rel="nofollow">https://news.ycombinator.com/item?id=213056</a><p><a href="https://news.ycombinator.com/item?id=419166" rel="nofollow">https://news.ycombinator.com/item?id=419166</a><p><a href="https://news.ycombinator.com/item?id=573912" rel="nofollow">https://news.ycombinator.com/item?id=573912</a><p><a href="https://news.ycombinator.com/item?id=896092" rel="nofollow">https://news.ycombinator.com/item?id=896092</a><p><a href="https://news.ycombinator.com/item?id=1599635" rel="nofollow">https://news.ycombinator.com/item?id=1599635</a><p><a href="https://news.ycombinator.com/item?id=2332793" rel="nofollow">https://news.ycombinator.com/item?id=2332793</a><p><a href="https://news.ycombinator.com/item?id=3115168" rel="nofollow">https://news.ycombinator.com/item?id=3115168</a><p><a href="https://news.ycombinator.com/item?id=3259199" rel="nofollow">https://news.ycombinator.com/item?id=3259199</a><p><a href="https://news.ycombinator.com/item?id=4526609" rel="nofollow">https://news.ycombinator.com/item?id=4526609</a><p><a href="https://news.ycombinator.com/item?id=8519365" rel="nofollow">https://news.ycombinator.com/item?id=8519365</a>