perf: unnecessary rpc call when coverage is disabled (#5658)

Author: AriPerkkio

packages/vitest/src/runtime/runners/index.ts

@@ -70,11 +70,14 @@ export async function resolveTestRunner(config: ResolvedConfig, executor: Vitest
   testRunner.onAfterRunFiles = async (files) => {
     const state = getWorkerState()
     const coverage = await takeCoverageInsideWorker(config.coverage, executor)
-    rpc().onAfterSuiteRun({
-      coverage,
-      transformMode: state.environment.transformMode,
-      projectName: state.ctx.projectName,
-    })
+
+    if (coverage) {
+      rpc().onAfterSuiteRun({
+        coverage,
+        transformMode: state.environment.transformMode,
+        projectName: state.ctx.projectName,
+      })
+    }
 
     await originalOnAfterRun?.call(testRunner, files)
   }