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Diffstat (limited to 'archive/custom/profile-dotemacs.el')
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diff --git a/archive/custom/profile-dotemacs.el b/archive/custom/profile-dotemacs.el new file mode 100644 index 00000000..8baee47b --- /dev/null +++ b/archive/custom/profile-dotemacs.el @@ -0,0 +1,161 @@ +;;; profile-dotemacs.el --- Profile your Emacs init file + +;; Copyright (C) 2010, 2012 David Engster + +;; Author: David Engster <dengste@eml.cc> + +;; This file is NOT part of GNU Emacs. + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the GNU General Public License +;; as published by the Free Software Foundation; either version 2 +;; of the License, or (at your option) any later version. +;; +;; This program is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with this program. If not, see <http://www.gnu.org/licenses/>. + +;;; Commentary: +;; +;; Profiles profile-dotemacs-file by evaluating top-level sexps with +;; benchmark-run, then overlays the source buffer so expensive forms stand out +;; by percentage of total runtime. +;; +;; Run with: +;; emacs -Q -l /path/to/profile-dotemacs.el -f profile-dotemacs +;; +;; Full sexps are the unit of measurement; split large conditional blocks before +;; profiling if finer detail is needed. + +;;; Code: + +(require 'thingatpt) +(require 'benchmark) + +;; User variables + +(defvar profile-dotemacs-file "~/.emacs.d/init.el" + "File to be profiled.") + +(defvar profile-dotemacs-low-percentage 3 + "Percentage which should be considered low. +All sexp's with a running time below this percentage will be +grayed out.") + +(defface profile-dotemacs-time-face + '((((background dark)) (:background "OrangeRed1")) + (t (:background "red3"))) + "Background color to indicate percentage of total time.") + +(defface profile-dotemacs-low-percentage-face + '((((background dark)) (:foreground "gray25")) + (t (:foreground "gray75"))) + "Face for sexps below `profile-dotemacs-low-percentage'.") + +(defface profile-dotemacs-highlight-face + '((((background dark)) (:background "blue")) + (t (:background "yellow"))) + "Highlight face for benchmark results.") + +;; Main function + +(defun profile-dotemacs () + "Load `profile-dotemacs-file' and benchmark its sexps." + (interactive) + (with-current-buffer (find-file-noselect profile-dotemacs-file t) + (setq buffer-read-only t) ;; just to be sure + (goto-char (point-min)) + (let (start end results) + (while + (< (point) + (setq end (progn + (forward-sexp 1) + (point)))) + (forward-sexp -1) + (setq start (point)) + (add-to-list + 'results + `(,start ,end + ,(benchmark-run + (eval (sexp-at-point))))) + (goto-char end)) + (profile-dotemacs-show-results results) + (switch-to-buffer (current-buffer))))) + +;; Helper functions + +(defun profile-dotemacs-show-results (results) + "Show timings from RESULTS in current buffer." + (let ((totaltime (profile-dotemacs-totaltime results)) + current percentage ov) + (while results + (let* ((current (pop results)) + (ov (make-overlay (car current) (cadr current))) + (current (car (last current))) + (percentage (/ (+ (car current) (nth 2 current)) + totaltime)) + col benchstr lowface) + (setq col + (profile-dotemacs-percentage-color + percentage + (face-background 'default) + (face-background 'profile-dotemacs-time-face))) + (setq percentage (round (* 100 percentage))) + (setq benchstr (profile-dotemacs-make-benchstr current)) + (overlay-put ov 'help-echo benchstr) + (if (and (numberp profile-dotemacs-low-percentage) + (< percentage profile-dotemacs-low-percentage)) + (overlay-put ov 'face 'profile-dotemacs-low-percentage-face) + (overlay-put ov 'before-string + (propertize benchstr + 'face 'profile-dotemacs-highlight-face)) + (overlay-put ov 'face + `(:background ,col))))) + (setq ov (make-overlay (1- (point-max)) (point-max))) + (overlay-put ov 'after-string + (propertize + (format "\n-----------------\nTotal time: %.2fs\n" + totaltime) + 'face 'profile-dotemacs-highlight-face)))) + +(defun profile-dotemacs-totaltime (results) + "Calculate total time of RESULTS." + (let ((totaltime 0)) + (mapc (lambda (x) + (let ((cur (car (last x)))) + (setq totaltime (+ totaltime (car cur) (nth 2 cur))))) + results) + totaltime)) + +(defun profile-dotemacs-percentage-color (percent col-begin col-end) + "Calculate color according to PERCENT between COL-BEGIN and COL-END." + (let* ((col1 (color-values col-begin)) + (col2 (color-values col-end)) + (col + (mapcar (lambda (c) + (round + (+ (* (- 1 percent) (nth c col1)) + (* percent (nth c col2))))) + '(0 1 2)))) + (format "RGB:%04x/%04x/%04x" + (car col) + (nth 1 col) + (nth 2 col)))) + +(defun profile-dotemacs-make-benchstr (timings) + "Create descriptive benchmark string from TIMINGS." + (format + (concat + "<Percentage: %d ; " + "Time: %.2f ; " + "Number of GC: %d ; " + "Time for GC: %.2f>\n") + percentage + (car timings) (nth 1 timings) (nth 2 timings))) + + +;; profile-dotemacs.el ends here |