Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/22429#discussion_r217913739
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
---
@@ -469,7 +470,13 @@ abstract class TreeNode[BaseType <:
TreeNode[BaseType]] extends Product {
def treeString: String = treeString(verbose = true)
def treeString(verbose: Boolean, addSuffix: Boolean = false): String = {
- generateTreeString(0, Nil, new StringBuilder, verbose = verbose,
addSuffix = addSuffix).toString
+ val bos = new ByteArrayOutputStream()
+ treeString(bos, verbose, addSuffix)
+ bos.toString
+ }
+
+ def treeString(os: OutputStream, verbose: Boolean, addSuffix: Boolean):
Unit = {
--- End diff --
Can you please use a `java.io.Writer` or something else you can directly
write a string to? You are now using `getBytes()` everywhere and that is far
from cheap because it needs to encode the chars and allocate a byte array for
each string.
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