Ultrarand Alternatives

ultrarand reviews and mentions

• Making the LinkedIn experimentation engine 20x faster
  4 projects | /r/Clojure | 23 Mar 2021

  There's a pretty interesting discussion on primitive arrays where the user is trying to match java performance exactly with an array-based thing that's simple enough to port, but is still a hair off due to clojure's default toward longs even for indexing (java wants int for array indices, so casts are necessary). Ended up getting identical performance using JiSE here, although the clojure variant with uncheckedIntCasts was fairly close (just not "equivalent to Java" per the common trope).

• Advent of Code 2020 Day 23 Crab Cups in Clojure (optimizing runtime from 10,000 years to 30 minutes)
  3 projects | /r/Clojure | 1 Jan 2021

  There's an intersting thread on zulip regarding getting identical performance with java arrays. Normally if you're using unchecked math and working with primitives, then you should get with a hair of java (not 2-3x slower). The remaining differences are due to uncheckedIntCast since Clojure forces longs for indices and java wants ints. The difference is I'm in the realm of nanos but is there. You can eliminate it with custom bytecode like with the JISE library which is fairly painless. Example .