How to accelerate this program?

[Unknown W. Brackets]

DMD 0.150 had some inlining bugs.  Try upgrading to 0.151.

Thanks,
-[Unknown]


> In article <e0ssod$2q8b$1 at digitaldaemon.com>, Dave says...
>> Please send:
>>
>> - the output from 'dmd -v' 
> lijie t # dmd -v
> Digital Mars D Compiler v0.150
> Copyright (c) 1999-2006 by Digital Mars written by Walter Bright
> Documentation: www.digitalmars.com/d/index.html
> Usage:
> dmd files.d ... { -switch }
> .... 
> 
>> - output from 'll /usr/lib/libphobos.a'.
> lijie t # ll /usr/lib/libphobos.a
> -rw-r--r--  1 root root 1157824  4月  4 13:05 /usr/lib/libphobos.a
> 
>> - what type of system is 'your system'
> My system is gentoo linux 2006.0
> Linux kernel version is 2.6.15
> g++ version is 3.4.4
> dmd version is 0.150
> 
>> - how large is the email file in bytes
> lijie t # ll email.txt
> -rw-r--r--  1 root root 19388869  4月  3 09:27 email.txt
> 
>> - which c++ compiler and flags are you using?
> I'm using -O2, it takes ~680 ms.
> And change to -O3 -fomit-frame-pointer -funroll-loops -mtune=pentium4, it takes
> ~630 ms.
> 
>> - dmd compiler flags for your test.
> dmd testd.d -O -release -inline
> 
> 
> some tests:
> =======================================
> lijie t # g++ -o test7 test7.cpp -O3 -fomit-frame-pointer -funroll-loops
> -mtune=pentium4
> lijie t # ./test7 email.txt email-new.txt
> Total used: 637 ms.
> lijie t # ./test7 email.txt email-new.txt
> Total used: 628 ms.
> lijie t # ./test7 email.txt email-new.txt
> Total used: 629 ms.
> lijie t # ./test7 email.txt email-new.txt
> Total used: 639 ms.
> lijie t # ./test7 email.txt email-new.txt
> Total used: 627 ms.
> 
> lijie t # dmd dave_test.d -O -release -inline
> gcc dave_test.o -o dave_test -lphobos -lpthread -lm
> lijie t # ./dave_test email.txt email-new.txt
> 3360
> lijie t # ./dave_test email.txt email-new.txt
> 3315
> lijie t # ./dave_test email.txt email-new.txt
> 3344
> lijie t # ./dave_test email.txt email-new.txt
> 3333
> lijie t # ./dave_test email.txt email-new.txt
> 3398
> 
> 
> Thanks.
> 
>