perf(siteruntime): deploy gate + InstanceActor PreStart share one Roslyn compile via the compile cache (plan R2-03 T6)

2026-07-13 09:54:49 -04:00
parent 1cc05f132f
commit 128d2bab73
3 changed files with 60 additions and 3 deletions
@@ -16,6 +16,7 @@ namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Scripts;
 /// <c>Stopwatch</c> stays allowed. The real execution-path compile against
 /// <c>ScriptGlobals</c> / <c>TriggerExpressionGlobals</c> is unchanged.
 /// </summary>
+[Collection("SiteScriptCompileCache")]
 public class ScriptCompilationServiceTests
 {
    private readonly ScriptCompilationService _service;
@@ -34,6 +35,28 @@ public class ScriptCompilationServiceTests
        Assert.Empty(result.Errors);
    }

+    [Fact]
+    public void Compile_SameCodeTwice_SharesOneRoslynCompile()
+    {
+        SiteScriptCompileCache.Clear();
+        var r1 = _service.Compile("deploy-gate-copy", "return 1 + 1;");
+        var r2 = _service.Compile("prestart-copy", "return 1 + 1;");
+
+        Assert.True(r1.IsSuccess);
+        Assert.Same(r1.CompiledScript, r2.CompiledScript);   // one compile, shared Script<T> (N4)
+        Assert.Equal(1, SiteScriptCompileCache.Hits);
+    }
+
+    [Fact]
+    public void Compile_ScriptAndTriggerExpression_DoNotCrossContaminate()
+    {
+        SiteScriptCompileCache.Clear();
+        var script = _service.Compile("s", "1 > 0");
+        var trigger = _service.CompileTriggerExpression("t", "1 > 0");
+
+        Assert.NotSame(script.CompiledScript, trigger.CompiledScript); // different globals surfaces
+    }
+
    [Fact]
    public void Compile_InvalidSyntax_ReturnsErrors()
    {