c++ builder / fileIO > TFile::Copy() > 大きいファイルのコピー時 > 「5秒以上の応答なし」の確認

C++ Builder XE4
Windows 7pro (3GB メモリ割当)

//---------------------------------------------------------------------------

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:    // IDE で管理されるコンポーネント
    TButton *Button1;
    void __fastcall Button1Click(TObject *Sender);
private:    // ユーザー宣言
public:     // ユーザー宣言
    __fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include <IOUtils.hpp>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    String from = L"D:\\TestData\\160713_FROM\\CentOS-6.8-x86_64-bin-DVD1.iso";
    String to = L"D:\\TestData\\160713_TO\\CentOS-6.8-x86_64-bin-DVD1.iso";

    try {
        TFile::Copy(from, to, /* overwrite=*/true);
    } catch (...) {
        int nop1 = 1;
    }
    int nop2 = 1;
}
//---------------------------------------------------------------------------