cloud-fan commented on a change in pull request #33063:
URL: https://github.com/apache/spark/pull/33063#discussion_r657973694
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File path:
core/src/main/scala/org/apache/spark/storage/ShuffleBlockFetcherIterator.scala
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@@ -435,26 +438,24 @@ final class ShuffleBlockFetcherIterator(
collectedRemoteRequests: ArrayBuffer[FetchRequest]): Unit = {
val iterator = blockInfos.iterator
var curRequestSize = 0L
- var curBlocks = Seq.empty[FetchBlockInfo]
+ var curBlocks = new ArrayBuffer[FetchBlockInfo]()
while (iterator.hasNext) {
val (blockId, size, mapIndex) = iterator.next()
assertPositiveBlockSize(blockId, size)
- curBlocks = curBlocks ++ Seq(FetchBlockInfo(blockId, size, mapIndex))
+ curBlocks += FetchBlockInfo(blockId, size, mapIndex)
curRequestSize += size
// For batch fetch, the actual block in flight should count for merged
block.
val mayExceedsMaxBlocks = !doBatchFetch && curBlocks.size >=
maxBlocksInFlightPerAddress
if (curRequestSize >= targetRemoteRequestSize || mayExceedsMaxBlocks) {
curBlocks = createFetchRequests(curBlocks, address, isLast = false,
- collectedRemoteRequests)
+ collectedRemoteRequests).to[ArrayBuffer]
Review comment:
how about
```
val newCurBlocks = createFetchRequests...
curBlocks.clear
curBlocks ++= newCurBlocks
```
Then `curBlocks` can be a val.
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