From cb37a5c7cb0132f01e20c885fc276d14d161c891 Mon Sep 17 00:00:00 2001
From: Tyler Gregg <greggt@amazon.com>
Date: Thu, 16 Jan 2025 15:45:50 -0800
Subject: [PATCH] Tunes the initial size of the EExpressionArgReader's
 expressions ArrayList.

---
 .../com/amazon/ion/impl/macro/EExpressionArgsReader.java     | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/amazon/ion/impl/macro/EExpressionArgsReader.java b/src/main/java/com/amazon/ion/impl/macro/EExpressionArgsReader.java
index 15bb6da65..a3bc1296f 100644
--- a/src/main/java/com/amazon/ion/impl/macro/EExpressionArgsReader.java
+++ b/src/main/java/com/amazon/ion/impl/macro/EExpressionArgsReader.java
@@ -25,8 +25,9 @@ public abstract class EExpressionArgsReader {
 
     private final ReaderAdapter reader;
 
-    // Reusable sink for expressions.
-    protected final List<Expression.EExpressionBodyExpression> expressions = new ArrayList<>(16);
+    // Reusable sink for expressions. The starting size of 64 is chosen so that growth is minimized or avoided for most
+    // e-expression invocations.
+    protected final List<Expression.EExpressionBodyExpression> expressions = new ArrayList<>(64);
 
     /**
      * Constructor.