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Add more StringBuilder benchmarks. #1999

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Merged
adamsitnik merged 1 commit into from
Sep 13, 2021
Merged

Add more StringBuilder benchmarks. #1999

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60 changes: 60 additions & 0 deletions src/benchmarks/micro/libraries/System.Text/Perf.StringBuilder.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -178,6 +178,26 @@ public StringBuilder Append_ValueTypes()
return builder;
}

// on .NET 6+, interpolated string handlers make appending more efficient by avoiding boxing and using ISpanFormattable.
[Benchmark]
public StringBuilder Append_ValueTypes_Interpolated()
{
var builder = new StringBuilder();

var dateTime = new DateTime(2018, 12, 14);
var timeSpan = new TimeSpan(1, 2, 0);
var dateTimeOffset = new DateTimeOffset(dateTime, timeSpan);
var guid = new Guid(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);

// to amortize the cost of creating the value types we add them few times
for (int i = 1; i <= 4; i++)
{
builder.Append($"{guid} {dateTime} {timeSpan} {dateTimeOffset}");
}

return builder;
}

[Benchmark]
public StringBuilder Append_Memory()
{
Expand All @@ -192,6 +212,46 @@ public StringBuilder Append_Memory()
return builder;
}

#if !NETFRAMEWORK
[Benchmark]
public StringBuilder Append_Span()
{
ReadOnlySpan<char> span = _string100.AsSpan();
StringBuilder builder = new StringBuilder();

builder.Append(span); builder.Append(span); builder.Append(span); builder.Append(span);
builder.Append(span); builder.Append(span); builder.Append(span); builder.Append(span);
builder.Append(span); builder.Append(span); builder.Append(span); builder.Append(span);
builder.Append(span); builder.Append(span); builder.Append(span); builder.Append(span);

return builder;
}
#endif

[Benchmark]
public StringBuilder Insert_Primitives()
{
StringBuilder builder = new StringBuilder();

for (int i = 1; i <= 10; i++)
{
builder.Insert(builder.Length / i, true);
builder.Insert(builder.Length / i, sbyte.MaxValue);
builder.Insert(builder.Length / i, byte.MaxValue);
builder.Insert(builder.Length / i, short.MaxValue);
builder.Insert(builder.Length / i, ushort.MaxValue);
builder.Insert(builder.Length / i, int.MaxValue);
builder.Insert(builder.Length / i, uint.MaxValue);
builder.Insert(builder.Length / i, long.MaxValue);
builder.Insert(builder.Length / i, ulong.MaxValue);
builder.Insert(builder.Length / i, double.MaxValue);
builder.Insert(builder.Length / i, float.MaxValue);
builder.Insert(builder.Length / i, decimal.MaxValue);
}

return builder;
}

[Benchmark]
public StringBuilder Insert_Strings()
{
Expand Down