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Performance optimisation for MSW direcotry timestamping.

This commit is contained in:
Jeff Young 2018-08-07 20:16:25 +01:00
parent 84504599ce
commit d63d0c40ef
1 changed files with 22 additions and 16 deletions
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38
common/common.cpp
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@ -707,28 +707,34 @@ long long TimestampDir( const wxString& aDirPath, const wxString& aFilespec )
{
long long timestamp = 0;
#ifdef __WINDOWS__
// wxFileName construction is egregiously slow. Construct it once and just swap out
// the filename thereafter.
WX_FILENAME fn( aDirPath, wxT( "dummyName" ) );
wxDir dir( aDirPath );
wxString fullname;
#if defined(__WIN32__)
// Win32 version.
// Save time by not searching for each path twice: once in wxDir.GetNext() and once in
// wxFileName.GetModificationTime(). Also cuts out wxWidgets string-matching and case
// conversion by staying on the MSW side of things.
std::string filespec( aDirPath.t_str() );
filespec += '\\';
filespec += aFilespec.t_str();
if( dir.IsOpened() )
WIN32_FIND_DATA findData;
wxDateTime lastModDate;
HANDLE fileHandle = ::FindFirstFile( filespec, &findData );
if( fileHandle != INVALID_HANDLE_VALUE )
{
if( dir.GetFirst( &fullname, aFilespec ) )
do
{
do
{
fn.SetFullName( fullname );
timestamp += fn.GetTimestamp();
}
while( dir.GetNext( &fullname ) );
ConvertFileTimeToWx( lastModDate, findData.ftLastWriteTime );
timestamp += lastModDate.GetValue().GetValue();
}
while ( FindNextFile( fileHandle, &findData ) != 0);
}
FindClose( fileHandle );
#else
// POSIX version. Save time by not converting between encodings -- do everything on
// the file-system side.
// POSIX version.
// Save time by not converting between encodings -- do everything on the file-system side.
std::string filespec( aFilespec.fn_str() );
std::string dir_path( aDirPath.fn_str() );