diff options
author | Cheng Hao <hao.cheng@intel.com> | 2014-05-07 16:54:58 -0400 |
---|---|---|
committer | Reynold Xin <rxin@apache.org> | 2014-05-07 16:54:58 -0400 |
commit | ca43186867f0120c29d1b27cfee0c7ff4a107d84 (patch) | |
tree | ce57c1c8fd11b82066df452899f23400c3d229c7 /sql/catalyst | |
parent | 3308722ca03f2bfa792e9a2cff9c894b967983d9 (diff) | |
download | spark-ca43186867f0120c29d1b27cfee0c7ff4a107d84.tar.gz spark-ca43186867f0120c29d1b27cfee0c7ff4a107d84.tar.bz2 spark-ca43186867f0120c29d1b27cfee0c7ff4a107d84.zip |
[SQL] Fix Performance Issue in data type casting
Using lazy val object instead of function in the class Cast, which improved the performance nearly by 2X in my local micro-benchmark.
Author: Cheng Hao <hao.cheng@intel.com>
Closes #679 from chenghao-intel/fix_type_casting and squashes the following commits:
71b0902 [Cheng Hao] using lazy val object instead of function for data type casting
Diffstat (limited to 'sql/catalyst')
-rw-r--r-- | sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala index 40d2b42a0c..0b3a4e728e 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala @@ -182,7 +182,7 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression { case x: NumericType => b => x.numeric.asInstanceOf[Numeric[Any]].toFloat(b) } - def cast: Any => Any = dataType match { + private lazy val cast: Any => Any = dataType match { case StringType => castToString case BinaryType => castToBinary case DecimalType => castToDecimal |