profiler.lsp

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Module: Profiler

Author: Jeff Ober
Version: 1.0
Location: http://static.artfulcode.net/newlisp/profiler.lsp

Profiles applications to help identify bottlenecks.

Version history

1.2 • added percentage of total time to report • added ability to sort report by column

1.1 • updated report to dynamically calculate column lengths • updated profile-context to accept multiple contexts

1.0 • initial release

example:

 (define (fib:fib n)
   (if (< n 2) 1
       (+ (fib (- n 1)) (fib (- n 2)))))
 
 (define (fib-memo:fib-memo n)
   (or (context 'fib-memo (string n))
       (if (< n 2) 1
           (context 'fib-memo (string n)
             (+ (fib-memo (- n 1)) (fib-memo (- n 2)))))))
 
 (Profiler:profile-context fib fib-memo)
 (dotimes (i 25)
   (println "Fib  " i ": " (fib i))
   (fib-memo i))
 (println)
 (Profiler:report 'calls)
 
 =>
 Fib  0: 1
 Fib  1: 1
 Fib  2: 2
 Fib  3: 3
 Fib  4: 5
 Fib  5: 8
 Fib  6: 13
 Fib  7: 21
 Fib  8: 34
 Fib  9: 55
 Fib  10: 89
 Fib  11: 144
 Fib  12: 233
 Fib  13: 377
 Fib  14: 610
 Fib  15: 987
 Fib  16: 1597
 Fib  17: 2584
 Fib  18: 4181
 Fib  19: 6765
 Fib  20: 10946
 Fib  21: 17711
 Fib  22: 28657
 Fib  23: 46368
 Fib  24: 75025
 
 function           |      calls |   total ms |      ms/call |     % time
 -------------------+------------+------------+--------------+-----------
 fib:fib            |     392809 |       4450 |     0.011329 |     100.00
 fib-memo:fib-memo  |         71 |          0 |     0.000000 |       0.00

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Profiler:reset-functions

syntax: (Profiler:reset-functions)

Resets functions to their values prior to being adapted for profiling. This function is automatically called when a profiler report is printed.

- § -

Profiler:reset-statistics

syntax: (Profiler:reset-statistics)

Resets profiler statistics. This function is automatically called when a profiler report is printed.

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Profiler:report

syntax: (Profiler:report sort-by)
parameter: column - to sort by (descending order); default is 'calls.

Prints statistics for functions profiled. sort-by may be 'times, 'calls, 'per-call, or 'percentage. Sorts by number of calls by default.

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Profiler:profiled-function

syntax: (Profiler:profiled-function func)
parameter: func - function to profile

Returns a modified function to use with the profiler.

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Profiler:profile-functions

syntax: (Profiler:profile-functions list-functions)
parameter: list-functions - list of functions to profile

Sets functions listed in list-functions to have statistics collected while they run. Protected and built-in functions cannot be profiled.

example:

 (define (foo x y) (+ x y))
 (define (bar x y) (foo x y))
 (Profiler:profile-functions '(foo bar))
 => '(foo bar)

- § -

Profiler:profile-context

syntax: (Profiler:profile-context ctx [ctx-2 ...])
parameter: ctx - context to profile

Updates all functions in context ctx to be profiled.

example:

 (define (foo:foo x y) (+ x y))
 (define (foo:bar x y) (foo x y))
 (Profiler:profile-context foo)
 => '(foo:bar foo:foo)

- ∂ -

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