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Reduce allocations required to create a TransformNode #72375

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merged 2 commits into from
Mar 6, 2024
Merged

Reduce allocations required to create a TransformNode #72375

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e6f518e
Reduce allocations required to create a TransformNode
ToddGrun Mar 3, 2024
26a90f2
get rid of else condition and replace with when condition on try/catch
ToddGrun Mar 6, 2024
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22 changes: 16 additions & 6 deletions src/Compilers/Core/Portable/SourceGeneration/Nodes/TransformNode.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -19,25 +19,27 @@ internal sealed class TransformNode<TInput, TOutput> : IIncrementalGeneratorNode
private readonly IEqualityComparer<TOutput> _comparer;
private readonly IIncrementalGeneratorNode<TInput> _sourceNode;
private readonly string? _name;
private readonly bool _wrapUserFunc;

public TransformNode(IIncrementalGeneratorNode<TInput> sourceNode, Func<TInput, CancellationToken, TOutput> userFunc, IEqualityComparer<TOutput>? comparer = null, string? name = null)
: this(sourceNode, userFunc: (i, token) => ImmutableArray.Create(userFunc(i, token)), comparer, name)
public TransformNode(IIncrementalGeneratorNode<TInput> sourceNode, Func<TInput, CancellationToken, TOutput> userFunc, bool wrapUserFunc = false, IEqualityComparer<TOutput>? comparer = null, string? name = null)
: this(sourceNode, userFunc: (i, token) => ImmutableArray.Create(userFunc(i, token)), wrapUserFunc, comparer, name)
{
}

public TransformNode(IIncrementalGeneratorNode<TInput> sourceNode, Func<TInput, CancellationToken, ImmutableArray<TOutput>> userFunc, IEqualityComparer<TOutput>? comparer = null, string? name = null)
public TransformNode(IIncrementalGeneratorNode<TInput> sourceNode, Func<TInput, CancellationToken, ImmutableArray<TOutput>> userFunc, bool wrapUserFunc = false, IEqualityComparer<TOutput>? comparer = null, string? name = null)
{
_sourceNode = sourceNode;
_func = userFunc;
_wrapUserFunc = wrapUserFunc;
_comparer = comparer ?? EqualityComparer<TOutput>.Default;
_name = name;
}

public IIncrementalGeneratorNode<TOutput> WithComparer(IEqualityComparer<TOutput> comparer)
=> new TransformNode<TInput, TOutput>(_sourceNode, _func, comparer, _name);
=> new TransformNode<TInput, TOutput>(_sourceNode, _func, _wrapUserFunc, comparer, _name);

public IIncrementalGeneratorNode<TOutput> WithTrackingName(string name)
=> new TransformNode<TInput, TOutput>(_sourceNode, _func, _comparer, name);
=> new TransformNode<TInput, TOutput>(_sourceNode, _func, _wrapUserFunc, _comparer, name);

public NodeStateTable<TOutput> UpdateStateTable(DriverStateTable.Builder builder, NodeStateTable<TOutput>? previousTable, CancellationToken cancellationToken)
{
Expand Down Expand Up @@ -73,7 +75,15 @@ public NodeStateTable<TOutput> UpdateStateTable(DriverStateTable.Builder builder
{
var stopwatch = SharedStopwatch.StartNew();
// generate the new entries
var newOutputs = _func(entry.Item, cancellationToken);
ImmutableArray<TOutput> newOutputs;
try
{
newOutputs = _func(entry.Item, cancellationToken);
}
catch (Exception e) when (_wrapUserFunc && !ExceptionUtilities.IsCurrentOperationBeingCancelled(e, cancellationToken))
{
throw new UserFunctionException(e);
}

if (entry.State != EntryState.Modified || !tableBuilder.TryModifyEntries(newOutputs, _comparer, stopwatch.Elapsed, inputs, entry.State))
{
Expand Down
8 changes: 4 additions & 4 deletions src/Compilers/Core/Portable/SourceGeneration/Nodes/ValueSourceExtensions.cs
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Expand Up @@ -13,16 +13,16 @@ namespace Microsoft.CodeAnalysis
public static class IncrementalValueProviderExtensions
{
// 1 => 1 transform
public static IncrementalValueProvider<TResult> Select<TSource, TResult>(this IncrementalValueProvider<TSource> source, Func<TSource, CancellationToken, TResult> selector) => new IncrementalValueProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunction(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);
public static IncrementalValueProvider<TResult> Select<TSource, TResult>(this IncrementalValueProvider<TSource> source, Func<TSource, CancellationToken, TResult> selector) => new IncrementalValueProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector, wrapUserFunc: source.CatchAnalyzerExceptions), source.CatchAnalyzerExceptions);

public static IncrementalValuesProvider<TResult> Select<TSource, TResult>(this IncrementalValuesProvider<TSource> source, Func<TSource, CancellationToken, TResult> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunction(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);
public static IncrementalValuesProvider<TResult> Select<TSource, TResult>(this IncrementalValuesProvider<TSource> source, Func<TSource, CancellationToken, TResult> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector, wrapUserFunc: source.CatchAnalyzerExceptions), source.CatchAnalyzerExceptions);

// 1 => many (or none) transform
public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValueProvider<TSource> source, Func<TSource, CancellationToken, ImmutableArray<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunction(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);
public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValueProvider<TSource> source, Func<TSource, CancellationToken, ImmutableArray<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector, wrapUserFunc: source.CatchAnalyzerExceptions), source.CatchAnalyzerExceptions);

public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValueProvider<TSource> source, Func<TSource, CancellationToken, IEnumerable<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunctionAsImmutableArray(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);

public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValuesProvider<TSource> source, Func<TSource, CancellationToken, ImmutableArray<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunction(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);
public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValuesProvider<TSource> source, Func<TSource, CancellationToken, ImmutableArray<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector, wrapUserFunc: source.CatchAnalyzerExceptions), source.CatchAnalyzerExceptions);

public static IncrementalValuesProvider<TResult> SelectMany<TSource, TResult>(this IncrementalValuesProvider<TSource> source, Func<TSource, CancellationToken, IEnumerable<TResult>> selector) => new IncrementalValuesProvider<TResult>(new TransformNode<TSource, TResult>(source.Node, selector.WrapUserFunctionAsImmutableArray(source.CatchAnalyzerExceptions)), source.CatchAnalyzerExceptions);

Expand Down
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