msamirkhan commented on a change in pull request #29354:
URL: https://github.com/apache/spark/pull/29354#discussion_r466000481
##########
File path:
external/avro/src/main/scala/org/apache/spark/sql/avro/SparkAvroDatumReader.scala
##########
@@ -638,90 +628,57 @@ class SparkAvroDatumReader[T](
/** Helper functions to create objects */
- private[this] def getRowCreator(st: StructType): () => InternalRow = {
- val constructorsArray = new Array[() => MutableValue](st.fields.length)
- var i = 0
- while (i < st.fields.length) {
- st.fields(i).dataType match {
- case BooleanType => constructorsArray(i) = () => new MutableBoolean
- case ByteType => constructorsArray(i) = () => new MutableByte
- case ShortType => constructorsArray(i) = () => new MutableShort
- // We use INT for DATE internally
- case IntegerType | DateType => constructorsArray(i) = () => new
MutableInt
- // We use Long for Timestamp internally
- case LongType | TimestampType => constructorsArray(i) = () => new
MutableLong
- case FloatType => constructorsArray(i) = () => new MutableFloat
- case DoubleType => constructorsArray(i) = () => new MutableDouble
- case _ => constructorsArray(i) = () => new MutableAny
- }
- i += 1
- }
- () => {
- val array = new Array[MutableValue](constructorsArray.length)
- var i = 0
- while (i < constructorsArray.length) {
- array(i) = constructorsArray(i).apply()
- i += 1
- }
- new SpecificInternalRow(array)
Review comment:
The profiler showed some time being spent in SpecificInternalRow
constructor, and we saw improvements when moving to this model where based on
the schema we can fill in a constructors array and for each data point, call
these constructors one by one. In retrospect, changes can instead be made to
the SpecificInternalRow constructor which will benefit #29353 as well. So
reverting here.
The changes to SpecificInternalRow constructor can be found here:
https://github.com/apache/spark/pull/29366
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