Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/16196#discussion_r91375333
--- Diff: core/src/main/scala/org/apache/spark/util/SizeEstimator.scala ---
@@ -316,62 +338,40 @@ object SizeEstimator extends Logging {
*/
private def getClassInfo(cls: Class[_]): ClassInfo = {
// Check whether we've already cached a ClassInfo for this class
- val info = classInfos.get(cls)
+ val info = classInfos.get().get(cls)
if (info != null) {
return info
}
val parent = getClassInfo(cls.getSuperclass)
+ val fields = cls.getDeclaredFields
+ val fieldCount = fields.length
var shellSize = parent.shellSize
- var pointerFields = parent.pointerFields
- val sizeCount = Array.fill(fieldSizes.max + 1)(0)
+ var fieldOffsets = parent.fieldOffsets.toList
+
+ var index = 0
- // iterate through the fields of this class and gather information.
- for (field <- cls.getDeclaredFields) {
+ while (index < fieldCount) {
+ val field = fields(index)
if (!Modifier.isStatic(field.getModifiers)) {
val fieldClass = field.getType
if (fieldClass.isPrimitive) {
- sizeCount(primitiveSize(fieldClass)) += 1
+ if (cls == classOf[Double] || cls == classOf[Long]) {
--- End diff --
This and the logic changes below aren't obviously OK. this seems to lose a
lot of logic. I think this has to be explained or backed out
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