u/bsless
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Never read the comment section
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Just opened a PR, atmospheric LUTs seemed like a a quick win and a way to get a feel of the code base
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
a. Very cool
b. Willing to lend a hand with any perf work if you're interested
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
It won't traverse the entire sequence, but it will traverse n elements twice, because, while lazy, take still consumes the entire sequence, and last eagerly consumes the entire sequence, so in total, each item in the taken n elements will be visited twice.
Also, take does not respect chunking, check the source.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
I'd say the weirdest part here is using last, because you're traversing the sequence twice.
This one is a good exercise in writing an iterative loop/recur
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Very sure https://github.com/bsless/clj-fast/issues/19
You should read this entire thread but TLDR:
lein injects TieredStopAtLevel=1 to cap tiered compilation.
The JIT compiler that you want to warm up has FOUR tiers. You won't even get to the interesting bits of warmup because lein sacrifices those, and you can't "delay" them until after the JVM started.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Lein disables advanced JIT compilation for faster start ups in development That's bad for Java performance and terrible for Clojure performance
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.
Regarding start up time - there are a few things you can do:
- Uberjar (done)
- Compiler options during uberjar creation: AOT everything, use direct linking and elide meta: https://clojure.org/reference/compilation#_compiler_options
- If you really want it to start quickly use class data sharing archive: https://docs.oracle.com/en/java/javase/17/vm/class-data-sharing.html
Also see some measurements: https://gist.github.com/bsless/fb79601eb2bfdee85ebf4663dbc7bb1b
