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perf: enlarge BoxedValues int cache to eliminate iterator index boxing #653

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Merged
rexm merged 3 commits into from
Aug 5, 2026
+6 −1
Merged

perf: enlarge BoxedValues int cache to eliminate iterator index boxing #653

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e4f268c
bench: enable MemoryDiagnoser on LargeArray and EndToEnd
rexm Aug 5, 2026
7c1eaef
perf: enlarge BoxedValues int cache from 20 to 1024
rexm Aug 5, 2026
a3635cb
Merge branch 'master' into perf/boxed-int-cache
rexm Aug 5, 2026
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1 change: 1 addition & 0 deletions source/Handlebars.Benchmark/EndToEnd.cs
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Expand Up @@ -8,6 +8,7 @@

namespace HandlebarsNet.Benchmark
{
[MemoryDiagnoser]
public class EndToEnd
{
private object? _data;
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1 change: 1 addition & 0 deletions source/Handlebars.Benchmark/LargeArray.cs
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Expand Up @@ -7,6 +7,7 @@

namespace HandlebarsNet.Benchmark
{
[MemoryDiagnoser]
public class LargeArray
{
private object _data = null!; // -> Setup()
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5 changes: 4 additions & 1 deletion source/Handlebars/Runtime/BoxedValues.cs
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Expand Up @@ -11,7 +11,10 @@ namespace HandlebarsDotNet.Runtime
/// </summary>
public static class BoxedValues
{
private const int BoxedIntegersCount = 20;
// Covers iterator indexes for effectively all template loops. The cache is
// ~32KB of process-lifetime statics (1024 boxes + the array), traded against
// a 24-byte allocation per iteration index >= the cache size on every render.
private const int BoxedIntegersCount = 1024;
private static readonly object[] BoxedIntegers = new object[BoxedIntegersCount];

static BoxedValues()
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