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StringBuilderCache.cs
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99 lines (84 loc) · 2.32 KB
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using System;
using System.Text;
namespace ServiceStack.Text
{
/// <summary>
/// Reusable StringBuilder ThreadStatic Cache
/// </summary>
public static class StringBuilderCache
{
[ThreadStatic]
static StringBuilder cache;
public static StringBuilder Allocate()
{
var ret = cache;
if (ret == null)
return new StringBuilder();
ret.Length = 0;
cache = null; //don't re-issue cached instance until it's freed
return ret;
}
public static void Free(StringBuilder sb)
{
cache = sb;
}
public static string ReturnAndFree(StringBuilder sb)
{
var ret = sb.ToString();
cache = sb;
return ret;
}
}
/// <summary>
/// Alternative Reusable StringBuilder ThreadStatic Cache
/// </summary>
public static class StringBuilderCacheAlt
{
[ThreadStatic]
static StringBuilder cache;
public static StringBuilder Allocate()
{
var ret = cache;
if (ret == null)
return new StringBuilder();
ret.Length = 0;
cache = null; //don't re-issue cached instance until it's freed
return ret;
}
public static void Free(StringBuilder sb)
{
cache = sb;
}
public static string ReturnAndFree(StringBuilder sb)
{
var ret = sb.ToString();
cache = sb;
return ret;
}
}
//Use separate cache internally to avoid reallocations and cache misses
internal static class StringBuilderThreadStatic
{
[ThreadStatic]
static StringBuilder cache;
public static StringBuilder Allocate()
{
var ret = cache;
if (ret == null)
return new StringBuilder();
ret.Length = 0;
cache = null; //don't re-issue cached instance until it's freed
return ret;
}
public static void Free(StringBuilder sb)
{
cache = sb;
}
public static string ReturnAndFree(StringBuilder sb)
{
var ret = sb.ToString();
cache = sb;
return ret;
}
}
}