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Janitor : Add performance test for string to int conversion

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This commit is contained in:
Magne Sjaastad
2021-10-19 14:11:47 +02:00
parent 54d1b67d88
commit 0f1e09ed9b
1 changed files with 57 additions and 0 deletions
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57
ApplicationLibCode/UnitTests/RiaStdStringTools-Test.cpp
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@@ -3,6 +3,7 @@
#include "RiaStdStringTools.h"
#include <QLocale>
#include <charconv>
//--------------------------------------------------------------------------------------------------
///
@@ -57,3 +58,59 @@ TEST( RiaStdStringToolsTest, TrimStrings )
EXPECT_EQ( text, expectedText );
}
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
TEST( RiaStdStringToolsTest, DISABLED_PerformanceConversion )
{
size_t itemCount = 1000000;
std::string valueAsString = "1234567";
int intValue = 0;
{
auto start = std::chrono::high_resolution_clock::now();
for ( size_t i = 0; i < itemCount; i++ )
{
intValue = std::stoi( valueAsString );
}
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end - start;
std::cout << "std::stoi (no try/catch) " << std::setw( 9 ) << diff.count() << " s\n";
}
{
auto start = std::chrono::high_resolution_clock::now();
for ( size_t i = 0; i < itemCount; i++ )
{
try
{
intValue = std::stoi( valueAsString );
}
catch ( ... )
{
}
}
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end - start;
std::cout << "std::stoi incl try/catch" << std::setw( 9 ) << diff.count() << " s\n";
}
{
auto start = std::chrono::high_resolution_clock::now();
for ( size_t i = 0; i < itemCount; i++ )
{
std::from_chars( valueAsString.data(), valueAsString.data() + valueAsString.size(), intValue );
}
auto end = std::chrono::high_resolution_clock::now();
std::chrono::duration<double> diff = end - start;
std::cout << "std::from_chars " << std::setw( 9 ) << diff.count() << " s\n";
}
}