Scored in the top 10 on level0 using a Bloom filter in C. Once you had an optimal solution, getting on the leaderboard came down to luck. 90% of the runtime of

Scored in the top 10 on level0 using a Bloom filter in C. Once you had an optimal solution, getting on the leaderboard came down to luck. 90% of the runtime of my program was operating system overhead that also happened on `int main() {}`. Today I realized I could've compiled with -nostdlib or -nostartfiles and halved that overhead - lesson for the future. If your binary needs to run faster than 1.5ms, libc is the next thing to cut :) I held the top leaderboard spot of level1 for a day or so (my hashrate varied between 1-5GH/s) but was pushed out in the last few hours by pushrax and the Stripe server load. Used an OpenCL + Go solution. Was a close race there by all. http://bochs.info/~aegis/rounds.tar.gz http://bochs.info/~aegis/rounds.tar.gz - tarball of all the Gitcoin round repos if anyone wants to play with the data.