Profiler

The goal of profiling is to find out the bottlenecks of the program, such as which function consumes most time, which function is called most times etc in order to improve application performance by "fixing" those hot spots.

profile.lisp. I think it is written by Peter Norvig?.
Metering by Mark Kantrowitz
SLIME provides an interface to the profilers of supported Lisps with its slime-profile-* functions.

SBCL has two: `sb-ext:profile' which instruments functions, and the statistical sampling sb-sprof contrib (based on CMUCL work).

(sb-profile:profile function names) (function call) (sb-profile:report)

(sb-sprof:with-profiling (:report :graph) (function call))

sb-sprof-ui is an interface to this.

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