zw.delphi不同版本程序运行速度测试

{
  zw.delphi不同版本程序运行速度测试
  
   delphi无论是开发,编译,还是运行,速度方面向来不差,笔者很少进行这种微粒度的优化,调试、
   最近,因为项目需要,发现:同一个函数模块,差不多同样的代码,升级后,比2007慢2-3倍
   涉及字符串、thashedlist,起初,感觉是uncode字符串函数,替换qstring函数的问题。
   测试后,发现:
   在短字符串方面,thashedstringlist,甚至字符串退换方面,xe10优化的更好,比d2007速度快20-50%,
   真正的瓶颈,出现在xe10对于长字符串(>500k)的处理上,特别是lowercase等函数,xe10版本比d2007慢3倍。
   ---------------------------------------------- 

   为公平起见,特意采用纯pascal编写相关的测试函数。
   理论上,适用于d7和其他版本的delphi,已在d2007,xe10测试通过
   测试环境:win7+64位,笔记本:i7-3720QM,8G内存

测试结果如下:
tst001,@d2007,tn,6708 ms,@xe.10,tn,3962 ms,重点测试thashedstringlist,xe10比d2007快了一倍
tst002,@d2007,tn,4227 ms,@xe.10,tn,2231 ms,测试短字符串替换(<500)
tst003,@d2007,tn,6100 ms,@xe.10,tn,4290 ms,测试长字符串替换(>500k)

tst004,测试其他字符串函数,长字符串(>500k)

lowercase,@d2007,tn,296 ms,@xe.10,tn,1092 ms,!!!瓶颈
leftStr,@d2007,tn,281 ms,@xe.10,tn,390 ms
rightStr,@d2007,tn,281 ms,@xe.10,tn,390 ms
pos,@d2007,tn,156 ms,@xe.10,tn,203 ms

}

//---------测试代码

function tst_Str1():string;
var i,j,k1,t0,t2,tn:integer;
  s2,kss,dss,ess,vss:string;
  xlib:thashedstringlist;
begin  //重点测试thashedstringlist
  xlib:=thashedstringlist.create;
  with mwin do begin msg.lines.add('');t0:=gettickcount;
    for i:=0 to 5000 do begin kss:='xk'+intToStr(i+10000);
      dss:='dx'+intToStr(i+10000);
      xlib.Values[kss]:=dss;
    end;
    t2:=gettickcount;
    //---tst
    for i:=1 to 10 do
    for j:=1 to 1000 do begin
        kss:='xk'+intToStr(j+10000);
        s2:=xlib.Values[kss];s2:=dss+s2;
   end;
   t2:=gettickcount;tn:=t2-t0;
   s2:='tst001,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
  end;
  xlib.free;
end;


function tst_Str2():string;
var i,j,k1,t0,t2,tn:integer;
  s2,dss,ess,vss:string;
begin //测试短字符串替换(<500)
  with mwin do begin msg.lines.add('');t0:=gettickcount;
    vss:='abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    for i:=1 to 500 do
    for j:=1 to 5000 do begin
      dss:=StringReplace(vss,'efg','123',[rfReplaceAll,rfIgnoreCase]);
    end;
    t2:=gettickcount;tn:=t2-t0;s2:='tst002,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
  end;
end;

function tst_Str3():string;
var i,j,k1,t0,t2,tn:integer;
  s2,dss,ess,vss:string;
begin  //测试长字符串替换(>500k)
  with mwin do begin msg.lines.add('');
    s2:='abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    for i:=1 to 3000 do vss:=vss+','+s2;
    t0:=gettickcount;
    for i:=1 to 2 do
    for j:=1 to 5 do begin
      dss:=StringReplace(vss,'efg','123',[rfReplaceAll,rfIgnoreCase]);
    end;
    t2:=gettickcount;tn:=t2-t0;s2:='tst003,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
  end;
end;


function tst_Str4():string;
var i,j,k1,t0,t2,tn:integer;
  s2,dss,ess,vss:string;
begin  //测试长字符串函数(>500k)
  with mwin do begin msg.lines.add('');
    s2:='abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    for i:=1 to 3000 do vss:=vss+','+s2;
    vss:='  '+vss+'   ';
    //--
    t0:=gettickcount;for i:=1 to 10 do for j:=1 to 500 do dss:=lowercase(vss);
    t2:=gettickcount;tn:=t2-t0;s2:='tst004,lowercase,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
    //---
    t0:=gettickcount;for i:=1 to 2000 do for j:=1 to 5000 do s2:=leftStr(vss,100);
    t2:=gettickcount;tn:=t2-t0;s2:='tst004,leftStr,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
    //--
    t0:=gettickcount;for i:=1 to 2000 do for j:=1 to 5000 do s2:=rightStr(vss,100);
    t2:=gettickcount;tn:=t2-t0;s2:='tst004,rightStr,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
    //--
    t0:=gettickcount;for i:=1 to 5000 do for j:=1 to 5000 do k1:=Pos('efg',vss);
    t2:=gettickcount;tn:=t2-t0;s2:='tst004,pos,tn,'+intToStr(tn)+' ms';msg.lines.add(s2);
  end;
end;

  

posted @ 2015-12-26 13:30  统领  阅读(1248)  评论(0编辑  收藏  举报