added a simple benchmarking suite

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54790 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/benchmarks/strings.cpp

@@ -0,0 +1,224 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        tests/benchmarks/strings.cpp
+// Purpose:     String-related benchmarks
+// Author:      Vadim Zeitlin
+// Created:     2008-07-19
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows license
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/string.h"
+
+#include "bench.h"
+
+static const char asciistr[] =
+    "This is just the first line of a very long 7 bit ASCII string"
+    "This is just the second line of a very long 7 bit ASCII string"
+    "This is just the third line of a very long 7 bit ASCII string"
+    "This is just the fourth line of a very long 7 bit ASCII string"
+    "This is just the fifth line of a very long 7 bit ASCII string"
+    "This is just the sixth line of a very long 7 bit ASCII string"
+    "This is just the seventh line of a very long 7 bit ASCII string"
+    "This is just the eighth line of a very long 7 bit ASCII string"
+    "This is just the ninth line of a very long 7 bit ASCII string"
+    "This is just the tenth line of a very long 7 bit ASCII string"
+    ;
+
+static const char utf8str[] =
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 0"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 1"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 2"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 3"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 4"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 5"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 6"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 7"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 8"
+    "\xD0\xA6\xD0\xB5\xD0\xBB\xD0\xBE\xD0\xB5 \xD1\x87\xD0\xB8\xD1\x81\xD0\xBB\xD0\xBE 9"
+    ;
+
+// this is just a baseline
+BENCHMARK_FUNC(Strlen)
+{
+    if ( strlen(utf8str) != WXSIZEOF(utf8str) - 1 )
+        return false;
+
+    if ( strlen(asciistr) != WXSIZEOF(asciistr) - 1 )
+        return false;
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// FromUTF8() benchmarks
+// ----------------------------------------------------------------------------
+
+BENCHMARK_FUNC(FromUTF8)
+{
+    wxString s = wxString::FromUTF8(utf8str);
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8(asciistr);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromUTF8WithNpos)
+{
+    wxString s = wxString::FromUTF8(utf8str, wxString::npos);
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8(asciistr, wxString::npos);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromUTF8WithLen)
+{
+    wxString s = wxString::FromUTF8(utf8str, WXSIZEOF(utf8str));
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8(asciistr, WXSIZEOF(asciistr));
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// FromUTF8Unchecked() benchmarks
+// ----------------------------------------------------------------------------
+
+BENCHMARK_FUNC(FromUTF8Unchecked)
+{
+    wxString s = wxString::FromUTF8Unchecked(utf8str);
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8Unchecked(asciistr);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromUTF8UncheckedWithNpos)
+{
+    wxString s = wxString::FromUTF8Unchecked(utf8str, wxString::npos);
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8Unchecked(asciistr, wxString::npos);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromUTF8UncheckedWithLen)
+{
+    wxString s = wxString::FromUTF8Unchecked(utf8str, WXSIZEOF(utf8str));
+    if ( s.empty() )
+        return false;
+
+    s = wxString::FromUTF8Unchecked(asciistr, WXSIZEOF(asciistr));
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// FromAscii() benchmarks
+// ----------------------------------------------------------------------------
+
+BENCHMARK_FUNC(FromAscii)
+{
+    wxString s = wxString::FromAscii(asciistr);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromAsciiWithNpos)
+{
+    wxString s = wxString::FromAscii(asciistr);
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+BENCHMARK_FUNC(FromAsciiWithLen)
+{
+    wxString s = wxString::FromAscii(asciistr, WXSIZEOF(asciistr));
+    if ( s.empty() )
+        return false;
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// simple string iteration
+// ----------------------------------------------------------------------------
+
+// baseline
+BENCHMARK_FUNC(ForCString)
+{
+    for ( size_t n = 0; n < WXSIZEOF(asciistr); n++ )
+    {
+        if ( asciistr[n] == '~' )
+            return false;
+    }
+
+    return true;
+}
+
+BENCHMARK_FUNC(ForStringIndex)
+{
+    const wxString s = wxString::FromAscii(utf8str);
+    const size_t len = s.length();
+    for ( size_t n = 0; n < len; n++ )
+    {
+        if ( s[n] == '~' )
+            return false;
+    }
+
+    return true;
+}
+
+BENCHMARK_FUNC(ForStringIter)
+{
+    const wxString s = wxString::FromAscii(utf8str);
+    const wxString::const_iterator end = s.end();
+    for ( wxString::const_iterator i = s.begin(); i != end; ++i )
+    {
+        if ( *i == '~' )
+            return false;
+    }
+
+    return true;
+}
+
+BENCHMARK_FUNC(ForStringRIter)
+{
+    const wxString s = wxString::FromAscii(utf8str);
+    const wxString::const_reverse_iterator rend = s.rend();
+    for ( wxString::const_reverse_iterator i = s.rbegin(); i != rend; ++i )
+    {
+        if ( *i == '~' )
+            return false;
+    }
+
+    return true;
+}
+