Github user jimfcarroll commented on the pull request:
https://github.com/apache/spark/pull/3254#issuecomment-68011659
Just an FYI. I changed line 141 of ParquetTableSupport.scala
(https://github.com/apache/spark/blob/ad42b283246b93654c5fd731cd618fee74d8c4da/sql/core/src/main/scala/org/apache/spark/sql/parquet/ParquetTableSupport.scala#L141)
from this
```scala
attributes = ParquetTypesConverter.convertFromString(origAttributesStr)
```
to look like this:
```scala
attributes =
ParquetTypesConverter.convertFromString(origAttributesStr).toArray[Attribute]
```
(I also changed the type of attributes to an Array[Attribute]). As
@MickDavies said, this seems to have a fairly dramatic affect on the
performance.
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