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io_benchmark: Add wxBufferedInputStream benchmarks 

When run, these show a 10x speed up over wxFileInputStream alone and
about 30% over wxFFInputStream.
This commit is contained in:
John Beard 2017-03-03 00:26:39 +08:00 committed by Wayne Stambaugh
parent 814ff7c7fc
commit 75a9589213
1 changed files with 59 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
tools/io_benchmark/io_benchmark.cpp
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@ -157,7 +157,7 @@ static void bench_line_reader_reuse( const wxString& aFile, int aReps, BENCH_REP
/**
* Benchmark using an INPUTSTREAM_LINE_READER with a given
* wxInputStream implementation.
* The INPUTSTREAM_LINE_READER is reset for each cycle.
* The wxInputStream is recreated for each cycle.
*/
template<typename S>
static void bench_wxis( const wxString& aFile, int aReps, BENCH_REPORT& report )
@ -182,7 +182,7 @@ static void bench_wxis( const wxString& aFile, int aReps, BENCH_REPORT& report )
/**
* Benchmark using an INPUTSTREAM_LINE_READER with a given
* wxInputStream implementation.
* The INPUTSTREAM_LINE_READER is recreated for each cycle.
* The wxInputStream is reset for each cycle.
*/
template<typename S>
static void bench_wxis_reuse( const wxString& aFile, int aReps, BENCH_REPORT& report )
@ -202,6 +202,58 @@ static void bench_wxis_reuse( const wxString& aFile, int aReps, BENCH_REPORT& re
}
}
/**
* Benchmark using a INPUTSTREAM_LINE_READER with a given
* wxInputStream implementation, buffered with wxBufferedInputStream.
* The wxInputStream is recreated for each cycle.
*/
template<typename WXIS>
static void bench_wxbis( const wxString& aFile, int aReps, BENCH_REPORT& report )
{
WXIS fileStream( aFile );
wxBufferedInputStream bufferedStream( fileStream );
for( int i = 0; i < aReps; ++i)
{
INPUTSTREAM_LINE_READER istr( &bufferedStream, aFile );
while( istr.ReadLine() )
{
report.linesRead++;
report.charAcc += (unsigned char) istr.Line()[0];
}
fileStream.SeekI( 0 );
}
}
/**
* Benchmark using a INPUTSTREAM_LINE_READER with a given
* wxInputStream implementation, buffered with wxBufferedInputStream.
* The wxInputStream is reset for each cycle.
*/
template<typename WXIS>
static void bench_wxbis_reuse( const wxString& aFile, int aReps, BENCH_REPORT& report )
{
WXIS fileStream( aFile );
wxBufferedInputStream bufferedStream( fileStream );
INPUTSTREAM_LINE_READER istr( &bufferedStream, aFile );
for( int i = 0; i < aReps; ++i)
{
while( istr.ReadLine() )
{
report.linesRead++;
report.charAcc += (unsigned char) istr.Line()[0];
}
fileStream.SeekI( 0 );
}
}
/**
* List of available benchmarks
*/
@ -217,6 +269,10 @@ static std::vector<BENCHMARK> benchmarkList =
{ 'W', bench_wxis<wxFileInputStream>, "wxFileIStream, reused" },
{ 'g', bench_wxis<wxFFileInputStream>, "wxFFileIStream" },
{ 'G', bench_wxis_reuse<wxFFileInputStream>, "wxFFileIStream, reused" },
{ 'b', bench_wxbis<wxFileInputStream>, "wxFileIStream. buf'd" },
{ 'B', bench_wxbis_reuse<wxFileInputStream>, "wxFileIStream, buf'd, reused" },
{ 'c', bench_wxbis<wxFFileInputStream>, "wxFFileIStream. buf'd" },
{ 'C', bench_wxbis_reuse<wxFFileInputStream>, "wxFFileIStream, buf'd, reused" },
};
@ -312,7 +368,7 @@ int main( int argc, char* argv[] )
BENCH_REPORT report = executeBenchMark( bmark, reps, inFile );
os << wxString::Format( "%-25s %u lines, acc: %u in %u ms",
os << wxString::Format( "%-30s %u lines, acc: %u in %u ms",
bmark.name, report.linesRead, report.charAcc, (int) report.benchDurMs.count() )
<< std::endl;;
}