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Optimize 'Span.Content' memory allocation

This commit is contained in:
Yves57 2016-12-22 13:48:33 +01:00 committed by Ryan Nowak
parent 6b075880ce
commit e9a688be15
1 changed files with 14 additions and 5 deletions
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19
src/Microsoft.AspNetCore.Razor.Evolution/Legacy/Span.cs
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@ -42,14 +42,23 @@ namespace Microsoft.AspNetCore.Razor.Evolution.Legacy
{ {
if (_content == null) if (_content == null)
{ {
var builder = new StringBuilder(); var symbolCount = Symbols.Count;
for (var i = 0; i < Symbols.Count; i++) if (symbolCount == 1)
{ {
var symbol = Symbols[i]; // Perf: no StringBuilder allocation if not necessary
builder.Append(symbol.Content); _content = Symbols[0].Content;
} }
else
{
var builder = new StringBuilder();
for (var i = 0; i < symbolCount; i++)
{
var symbol = Symbols[i];
builder.Append(symbol.Content);
}
_content = builder.ToString(); _content = builder.ToString();
}
} }
return _content; return _content;