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[SPARK-7795] [Core] Speed up task scheduling in standalone mode by reusing serializer #6323

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[SPARK-7795] [Core] Speed up task scheduling in standalone mode by reusing serializer #6323

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fe530cd
Speed up task scheduling in standalone mode by reusing serializer
coolfrood May 21, 2015
0b8ca93
Incorporate review comments
coolfrood May 21, 2015
bd4a5dd
Style fix
coolfrood May 21, 2015
12d8c9e
Reduce visibility of serializer
coolfrood May 22, 2015
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Speed up task scheduling in standalone mode by reusing serializer 
instead of creating a new one for each task.
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@coolfrood
coolfrood committed May 21, 2015
commit fe530cddae1cb573387f7fc1eb344513c91d69bb
2 changes: 1 addition & 1 deletion core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
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Expand Up @@ -183,8 +183,8 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp

// Launch tasks returned by a set of resource offers
def launchTasks(tasks: Seq[Seq[TaskDescription]]) {
val ser = SparkEnv.get.closureSerializer.newInstance()
for (task <- tasks.flatten) {
val ser = SparkEnv.get.closureSerializer.newInstance()
val serializedTask = ser.serialize(task)
if (serializedTask.limit >= akkaFrameSize - AkkaUtils.reservedSizeBytes) {
val taskSetId = scheduler.taskIdToTaskSetId(task.taskId)
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