#!/usr/bin/python## Copyright 2004 Matt Mackall <mpm@selenic.com>## inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen## This software may be used and distributed according to the terms# of the GNU General Public License, incorporated herein by reference. import sys, os, refrom signal import signal, SIGPIPE, SIG_DFL signal(SIGPIPE, SIG_DFL) if len(sys.argv) != 3:    sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])    sys.exit(-1) re_NUMBER = re.compile(r'\.[0-9]+') def getsizes(file):    sym = {}    with os.popen("nm --size-sort " + file) as f:        for line in f:            size, type, name = line.split()            if type in "tTdDbBrR":                # strip generated symbols                if name.startswith("__mod_"): continue                if name.startswith("SyS_"): continue                if name.startswith("compat_SyS_"): continue                if name == "linux_banner": continue                # statics and some other optimizations adds random .NUMBER                name = re_NUMBER.sub('', name)                sym[name] = sym.get(name, 0) + int(size, 16)    return sym old = getsizes(sys.argv[1])new = getsizes(sys.argv[2])grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0delta, common = [], {}otot, ntot = 0, 0 for a in old:    if a in new:        common[a] = 1 for name in old:    otot += old[name]    if name not in common:        remove += 1        down += old[name]        delta.append((-old[name], name)) for name in new:    ntot += new[name]    if name not in common:        add += 1        up += new[name]        delta.append((new[name], name)) for name in common:        d = new.get(name, 0) - old.get(name, 0)        if d>0: grow, up = grow+1, up+d        if d<0: shrink, down = shrink+1, down-d        delta.append((d, name)) delta.sort()delta.reverse() print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \      (add, remove, grow, shrink, up, -down, up-down))print("%-40s %7s %7s %+7s" % ("function", "old", "new", "delta"))for d, n in delta:    if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d)) print("Total: Before=%d, After=%d, chg %+.2f%%" % \    (otot, ntot, (ntot - otot)*100.0/otot))