So I finished all the 2021 solutions in Erlang with a total runtime of < 10s which I am very happy with:
Year Day Name Time (msecs)
------ ----- ----------------------- --------------
2021 24 Arithmetic Logic Unit 0.338
2021 10 Syntax Scoring 0.717
2021 2 Dive! 0.773
2021 1 Sonar Sweep 0.849
2021 6 Lanternfish 0.963
2021 13 Transparent Origami 2.112
2021 3 Binary Diagnostics 2.619
2021 14 Extended Polymerization 4.008
2021 16 Packet Decoder 4.83
2021 8 Seven Segment Stretch 7.495
2021 9 Smoke Basin 13.564
2021 4 Giant Squid 23.715
2021 22 Reactor Reboot 40.28
2021 11 Dumbo Octopus 58.305
2021 7 The Treachery of Whales 91.935
2021 21 Dirac Dice 140.429
2021 17 Trick Shot 160.075
2021 12 Passage Pathing 274.693
2021 5 Hydrothermal Venture 321.489
2021 18 Snailfish 409.204
2021 15 Chiton 732.866
2021 25 Sea Cucumber 781.054
2021 19 Beacon Scanner 1934.517
2021 23 Amphipod 2031.776
2021 20 Trench Map 2361.754
Total time 9.43458 secs
All solutions can be found here: GitHub - jesperes/aoc_erlang: Advent of Code Solutions in Erlang.