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 "tTdDbBrR":
  21             # strip generated symbols
  22             if name[:6] == "__mod_": continue
  23             # function names begin with '.' on 64-bit powerpc
  24             if "." in name[1:]: name = "static." + name.split(".")[0]
  25             sym[name] = sym.get(name, 0) + int(size, 16)
  26     return sym
  27
  28 old = getsizes(sys.argv[1])
  29 new = getsizes(sys.argv[2])
  30 grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
  31 delta, common = [], {}
  32
  33 for a in old:
  34     if a in new:
  35         common[a] = 1
  36
  37 for name in old:
  38     if name not in common:
  39         remove += 1
  40         down += old[name]
  41         delta.append((-old[name], name))
  42
  43 for name in new:
  44     if name not in common:
  45         add += 1
  46         up += new[name]
  47         delta.append((new[name], name))
  48
  49 for name in common:
  50         d = new.get(name, 0) - old.get(name, 0)
  51         if d>0: grow, up = grow+1, up+d
  52         if d<0: shrink, down = shrink+1, down-d
  53         delta.append((d, name))
  54
  55 delta.sort()
  56 delta.reverse()
  57
  58 print "add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
  59       (add, remove, grow, shrink, up, -down, up-down)
  60 print "%-40s %7s %7s %+7s" % ("function", "old", "new", "delta")
  61 for d, n in delta:
  62     if d: print "%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)