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Optimize calculation of standard deviation.

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This commit is contained in:
Bartosz Taudul
2019-03-14 01:23:37 +01:00
parent f57cac9042
commit a0299cc63a
3 changed files with 6 additions and 7 deletions
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10
server/TracyView.cpp
View File

@@ -6029,14 +6029,10 @@ void View::DrawFindZone()
TextFocused( "Median time:", TimeToString( m_findZone.median ) );
if( m_findZone.sorted.size() > 1 )
{
const auto sz = m_findZone.sorted.size();
const auto avg = m_findZone.average;
double ss = 0;
for( auto& v : m_findZone.sorted )
{
const auto d = double( v ) - avg;
ss += d*d;
}
const auto sd = sqrt( ss / ( m_findZone.sorted.size() - 1 ) );
const auto ss = zoneData.sumSq - 2. * zoneData.total * avg + avg * avg * sz;
const auto sd = sqrt( ss / ( sz - 1 ) );
ImGui::SameLine();
ImGui::Spacing();