Merge branch 'master' into compat-default-value

.github/workflows/benchmarks.yml

@@ -57,10 +57,6 @@ jobs:
         with:
           name: build-output
           path: preact.tgz
-      - name: Initialize Tachometer Results Report
-        uses: andrewiggins/tachometer-reporter-action@v2
-        with:
-          initialize: true
 
   bench_text_update:
     name: Bench text_update
@@ -257,26 +253,3 @@ jobs:
         with:
           name: results
           path: benches/results/filter_list.json
-
-  report_results:
-    name: Report Results
-    runs-on: ubuntu-latest
-    needs:
-      - bench_text_update
-      - bench_many_updates
-      - bench_02_replace1k
-      - bench_03_update10th1k_x16
-      - bench_07_create10k
-      - bench_hydrate1k
-      - bench_filter_list
-    steps:
-      - uses: actions/download-artifact@v2
-        with:
-          name: results
-          path: results
-      - uses: andrewiggins/tachometer-reporter-action@v2
-        with:
-          path: results/*.json
-          base-bench-name: preact-master
-          pr-bench-name: preact-local
-          summarize: 'duration, usedJSHeapSize'

.github/workflows/pr-reporter.yml

@@ -0,0 +1,51 @@
+name: Report Results to PR
+
+on:
+  # The pull_request event can't write comments for PRs from forks so using this
+  # workflow_run workflow as a workaround
+  workflow_run:
+    workflows: ['Benchmarks']
+    branches: ['**']
+    types:
+      - completed
+      - requested
+
+jobs:
+  report_running:
+    name: Report benchmarks are in-progress
+    runs-on: ubuntu-latest
+    # Only add the "benchmarks are running" text when a workflow_run is
+    # requested (a.k.a starting)
+    if: ${{ github.event.action == 'requested' }}
+    steps:
+      - name: Report Tachometer Running
+        uses: andrewiggins/tachometer-reporter-action@v2
+        with:
+          # Set initialize to true so this action just creates the comment or
+          # adds the "benchmarks are running" text
+          initialize: true
+
+  report_results:
+    name: Report benchmark results
+    runs-on: ubuntu-latest
+    # Only run this job if the event action was "completed" and the triggering
+    # workflow_run was successful
+    if: ${{ github.event.action == 'completed' && github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      # Download the artifact from the triggering workflow that contains the
+      # Tachometer results to report
+      - uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: ${{ github.event.workflow.id }}
+          run_id: ${{ github.event.workflow_run.id }}
+          name: results
+          path: results
+
+      # Create/update the comment with the latest results
+      - name: Report Tachometer Results
+        uses: andrewiggins/tachometer-reporter-action@v2
+        with:
+          path: results/*.json
+          base-bench-name: preact-master
+          pr-bench-name: preact-local
+          summarize: 'duration, usedJSHeapSize'

.github/workflows/main.yml → .github/workflows/size.yml

@@ -1,15 +1,17 @@
 name: Compressed Size
 
-on: [pull_request]
+on:
+  pull_request:
+    branches:
+      - '**'
+    paths:
+      - '**/src/**.js'
 
 jobs:
   build:
     runs-on: ubuntu-latest
-
     steps:
-      - uses: actions/checkout@v2-beta
-        with:
-          fetch-depth: 1
+      - uses: actions/checkout@v2
       - uses: preactjs/compressed-size-action@v1
         with:
           repo-token: '${{ secrets.GITHUB_TOKEN }}'

src/diff/index.js

@@ -300,30 +300,25 @@ function diffElementNodes(
 	commitQueue,
 	isHydrating
 ) {
-	let i;
 	let oldProps = oldVNode.props;
 	let newProps = newVNode.props;
 	let nodeType = newVNode.type;
+	let i = 0;
 
 	// Tracks entering and exiting SVG namespace when descending through the tree.
 	if (nodeType === 'svg') isSvg = true;
 
 	if (excessDomChildren != null) {
-		for (i = 0; i < excessDomChildren.length; i++) {
+		for (; i < excessDomChildren.length; i++) {
 			const child = excessDomChildren[i];
 
 			// if newVNode matches an element in excessDomChildren or the `dom`
 			// argument matches an element in excessDomChildren, remove it from
 			// excessDomChildren so it isn't later removed in diffChildren
-			//
-			// Note: This takes advantage of Text nodes having `.localName=undefined`,
-			// which is loosely equal to Text VNodes' `.type=null`. Elements use string equality.
 			if (
-				child != null &&
-				((nodeType === null
-					? child.nodeType === 3
-					: child.localName === nodeType) ||
-					dom == child)
+				child &&
+				(child === dom ||
+					(nodeType ? child.localName == nodeType : child.nodeType == 3))
 			) {
 				dom = child;
 				excessDomChildren[i] = null;
@@ -364,9 +359,9 @@ function diffElementNodes(
 			dom.data = newProps;
 		}
 	} else {
-		if (excessDomChildren != null) {
-			excessDomChildren = EMPTY_ARR.slice.call(dom.childNodes);
-		}
+		// If excessDomChildren was not null, repopulate it with the current element's children:
+		excessDomChildren =
+			excessDomChildren && EMPTY_ARR.slice.call(dom.childNodes);
 
 		oldProps = oldVNode.props || EMPTY_OBJ;