Question

In trying to optimize C and LISP, looking at the assembler code output by the compiler can be a great help.

Clojure presumably compiles to a JVM bytecode that would be equally helpful.

How do I see it?

Answer 1

Clojure dynamically compiles all the Clojure code to bytecode at the runtime. I am not sure how you can see this dynamically compiled bytecode. However, you can do Ahead Of Time (AOT) compilation of your Clojure code yourself and that will generate .class files. Then you can use javap to see the bytecode.

Use the compile function in Clojure/core to compile your namespace:

compile
function

Usage: (compile lib)

Compiles the namespace named by the symbol lib into a set of
classfiles. The source for the lib must be in a proper
classpath-relative directory. The output files will go into the
directory specified by compile-path, and that directory too must
be in the classpath.

Then use javap:

javap -l -c -s -private MyClass