Root/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
10import sys, os, re
11
12if len(sys.argv) != 3:
13    sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])
14    sys.exit(-1)
15
16def 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
26old = getsizes(sys.argv[1])
27new = getsizes(sys.argv[2])
28grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
29delta, common = [], {}
30
31for a in old:
32    if a in new:
33        common[a] = 1
34
35for name in old:
36    if name not in common:
37        remove += 1
38        down += old[name]
39        delta.append((-old[name], name))
40
41for name in new:
42    if name not in common:
43        add += 1
44        up += new[name]
45        delta.append((new[name], name))
46
47for 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
53delta.sort()
54delta.reverse()
55
56print "add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
57      (add, remove, grow, shrink, up, -down, up-down)
58print "%-40s %7s %7s %+7s" % ("function", "old", "new", "delta")
59for d, n in delta:
60    if d: print "%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)
61

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