Function: profiler-start

profiler-start is an autoloaded, interactive and byte-compiled function defined in profiler.el.gz.

Signature

(profiler-start MODE)

Documentation

Start/restart profilers.

MODE can be one of cpu, mem, or cpu+mem. If MODE is cpu or cpu+mem, start the time-based profiler,
   whereby CPU is sampled periodically using the SIGPROF signal.
If MODE is mem or cpu+mem, start profiler that samples CPU
   whenever memory-allocation functions are called -- this is useful
   if SIGPROF is not supported, or is unreliable, or is not sampling
   at a high enough frequency.

Probably introduced at or before Emacs version 24.3.

Key Bindings

Source Code

;; Defined in /usr/src/emacs/lisp/profiler.el.gz
;;; Profiler commands

;;;###autoload
(defun profiler-start (mode)
  "Start/restart profilers.
MODE can be one of `cpu', `mem', or `cpu+mem'.
If MODE is `cpu' or `cpu+mem', start the time-based profiler,
   whereby CPU is sampled periodically using the SIGPROF signal.
If MODE is `mem' or `cpu+mem', start profiler that samples CPU
   whenever memory-allocation functions are called -- this is useful
   if SIGPROF is not supported, or is unreliable, or is not sampling
   at a high enough frequency."
  (interactive
   (list (if (not (fboundp 'profiler-cpu-start)) 'mem
           (intern (completing-read (format-prompt "Mode" "cpu")
                                    '("cpu" "mem" "cpu+mem")
                                    nil t nil nil "cpu")))))
  (cl-ecase mode
    (cpu
     (profiler-cpu-start profiler-sampling-interval)
     (message "CPU profiler started"))
    (mem
     (profiler-memory-start)
     (message "Memory profiler started"))
    (cpu+mem
     (profiler-cpu-start profiler-sampling-interval)
     (profiler-memory-start)
     (message "CPU and memory profiler started"))))