profiling

[justin2004]

i was comparing performance of my first implementaion of a sobel edge detector with the stencil implementation and i used https://github.com/40ants/cl-flamegraph and i looked at the results with https://www.speedscope.app/

my first version:

stencil version:

in order to get cl-flamegraph to run i had to apply this patch:

diff --git a/core.lisp b/core.lisp
index de2ed9f..580fc36 100644
--- a/core.lisp
+++ b/core.lisp
@@ -6,6 +6,7 @@
   (:export
    #:save-flame-graph))
 (in-package flamegraph)
+(declaim (optimize (speed 0) (safety 0) (debug 3)))

with SBCL 2.0.11.debian

[justin2004]

cl-flamegraph counts "number of calls"