JOP

=>'java top'

• Simple commandline utility that parses the output of java verbose gc and plots it in a graph
• Can be used for tailing the file (showing the results in realtime), or on historic files
• Written in rust. Executable size (release) 2Mb.
• Sample usage:

java -verbose:gc -cp src Filler >outfile

and:

jop outfile

or:

cargo run outfile

• tested on jdk20/G1 collector
• depends on tail command, so works best on linux/unix/macos

[GREEN] heap size before garbage collection [RED] heapsize after garbage collection