FelixYBW commented on code in PR #10619:
URL: 
https://github.com/apache/incubator-gluten/pull/10619#discussion_r2324355385


##########
backends-velox/src/main/scala/org/apache/gluten/backendsapi/velox/VeloxMetricsApi.scala:
##########
@@ -61,9 +62,26 @@ class VeloxMetricsApi extends MetricsApi with Logging {
       )
     }
 
+    val wallNanosMetric = if (forShuffle) {
+      // For input from shuffle, the time of shuffle read is inclusive to the 
metrics.
+      SQLMetrics.createNanoTimingMetric(
+        sparkContext,
+        "time of input iterator (shuffle read time inclusive)")

Review Comment:
   name is too long. Can you rename it as "time of reducer input"



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