Log the previously rendered component as a deduped entry

Author: sebmarkbage

packages/react-client/src/ReactFlightClient.js

@@ -2812,6 +2812,7 @@ function flushComponentPerformance(
   // First find the start time of the first component to know if it was running
   // in parallel with the previous.
   const debugInfo = root._debugInfo;
+  let selfEndTime = -Infinity;
   if (debugInfo) {
     for (let i = 1; i < debugInfo.length; i++) {
       const info = debugInfo[i];