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Use dotnet ForEachAsync implementation #15936

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merged 2 commits into from
May 1, 2024
Merged

Use dotnet ForEachAsync implementation #15936

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03d531a
Use dotnet ForEachAsync implementation
sebastienros May 1, 2024
d6596fc
Merge branch 'main' into sebros/concurrent
MikeAlhayek May 1, 2024
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29 changes: 0 additions & 29 deletions src/OrchardCore/OrchardCore.Abstractions/Modules/Extensions/EnumerableExtensions.cs
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6 changes: 2 additions & 4 deletions src/OrchardCore/OrchardCore/Extensions/ExtensionManager.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -298,11 +298,11 @@ private async Task EnsureInitializedAsync()
var loadedExtensions = new ConcurrentDictionary<string, ExtensionEntry>();

// Load all extensions in parallel
await modules.ForEachAsync((module) =>
Parallel.ForEach(modules, (module, cancellationToken) =>
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Why not use Parallel.ForEachAsync() here too?

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the delegate is synchronous. No need for asynchronous

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EnsureInitializedAsync() is though so it can make use of async.

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but that is done before the parallel call. The parallel call does not need async

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Parallel.ForEach() blocks the calling thread, since it's synchronous. So, that thread will just wait, like synchronous IO does. Parallel.ForEachAsync() being async, the calling thread won't be blocked (and can thus be used to e.g. serve as one of the threads used for the loop).

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the calling thread won't be blocked (and can thus be used to e.g. serve as one of the threads used for the loop)

But it won't because there is no async code in the parallel lambdas.

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What will the thread of EnsureInitializedAsync() do until Parallel.ForEach() returns?

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The only other thing we could change is that since nothing is asynchronous we can remove the async pattern on this method. And replace the semaphore with a lock. To remove any assumption that this is actually async.

{
if (!module.ModuleInfo.Exists)
{
return Task.CompletedTask;
return;
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}

var manifestInfo = new ManifestInfo(module.ModuleInfo);
Expand All @@ -319,8 +319,6 @@ await modules.ForEachAsync((module) =>
};

loadedExtensions.TryAdd(module.Name, entry);

return Task.CompletedTask;
});

var loadedFeatures = new Dictionary<string, FeatureEntry>();
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4 changes: 2 additions & 2 deletions src/OrchardCore/OrchardCore/Modules/ModularBackgroundService.cs
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Expand Up @@ -102,7 +102,7 @@ protected override async Task ExecuteAsync(CancellationToken stoppingToken)

private async Task RunAsync(IEnumerable<(string Tenant, long UtcTicks)> runningShells, CancellationToken stoppingToken)
{
await GetShellsToRun(runningShells).ForEachAsync(async tenant =>
await Parallel.ForEachAsync(GetShellsToRun(runningShells), async (tenant, cancellationToken) =>
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{
// Check if the shell is still registered and running.
if (!_shellHost.TryGetShellContext(tenant, out var shell) || !shell.Settings.IsRunning())
Expand Down Expand Up @@ -238,7 +238,7 @@ private async Task UpdateAsync(
{
var referenceTime = DateTime.UtcNow;

await GetShellsToUpdate(previousShells, runningShells).ForEachAsync(async tenant =>
await Parallel.ForEachAsync(GetShellsToUpdate(previousShells, runningShells), async (tenant, cancellationToken) =>
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{
if (stoppingToken.IsCancellationRequested)
{
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