check if the render scheduled higher pri work

sebmarkbage · sebmarkbage · commit c9c6c0a4c57e · 2019-08-07T15:01:39.000-07:00
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.js b/packages/react-reconciler/src/ReactFiberWorkLoop.js
@@ -1278,7 +1278,12 @@ function workLoopSync() {
 
 function workLoop() {
   // Perform work until Scheduler asks us to yield
-  while (workInProgress !== null && !shouldYield()) {
+  while (
+    workInProgress !== null &&
+    !shouldYield() &&
+    workInProgressRoot !== null &&
+    renderExpirationTime >= workInProgressRoot.firstPendingTime
+  ) {
     workInProgress = performUnitOfWork(workInProgress);
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -1278,7 +1278,12 @@ function workLoopSync() {`
`1278`	`1278`
`1279`	`1279`	`function workLoop() {`
`1280`	`1280`	`// Perform work until Scheduler asks us to yield`
`1281`		`- while (workInProgress !== null && !shouldYield()) {`
	`1281`	`+ while (`
	`1282`	`+ workInProgress !== null &&`
	`1283`	`+ !shouldYield() &&`
	`1284`	`+ workInProgressRoot !== null &&`
	`1285`	`+ renderExpirationTime >= workInProgressRoot.firstPendingTime`
	`1286`	`+ ) {`
`1282`	`1287`	`workInProgress = performUnitOfWork(workInProgress);`
`1283`	`1288`	`}`
`1284`	`1289`	`}`