scripts/bloat-o-meter

   1 #!/usr/bin/python
   2 #
   3 # Copyright 2004 Matt Mackall <mpm@selenic.com>
   4 #
   5 # inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
   6 #
   7 # This software may be used and distributed according to the terms
   8 # of the GNU General Public License, incorporated herein by reference.
   9
  10 import sys, os, re
  11
  12 if len(sys.argv) != 3:
  13     sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
  14     sys.exit(-1)
  15
  16 def getsizes(file):
  17     sym = {}
  18     for l in os.popen("nm --size-sort " + file).readlines():
  19         size, type, name = l[:-1].split()
  20         if type in "tTdDbB":
  21             # function names begin with '.' on 64-bit powerpc
  22             if "." in name[1:]: name = "static." + name.split(".")[0]
  23             sym[name] = sym.get(name, 0) + int(size, 16)
  24     return sym
  25
  26 old = getsizes(sys.argv[1])
  27 new = getsizes(sys.argv[2])
  28 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
  29 delta, common = [], {}
  30
  31 for a in old:
  32     if a in new:
  33         common[a] = 1
  34
  35 for name in old:
  36     if name not in common:
  37         remove += 1
  38         down += old[name]
  39         delta.append((-old[name], name))
  40
  41 for name in new:
  42     if name not in common:
  43         add += 1
  44         up += new[name]
  45         delta.append((new[name], name))
  46
  47 for name in common:
  48         d = new.get(name, 0) - old.get(name, 0)
  49         if d>0: grow, up = grow+1, up+d
  50         if d<0: shrink, down = shrink+1, down-d
  51         delta.append((d, name))
  52
  53 delta.sort()
  54 delta.reverse()
  55
  56 print "add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
  57       (add, remove, grow, shrink, up, -down, up-down)
  58 print "%-40s %7s %7s %+7s" % ("function", "old", "new", "delta")
  59 for d, n in delta:
  60     if d: print "%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)