From 2aae990acb1312da2f4a687faecab5fa2e1efbf1 Mon Sep 17 00:00:00 2001
From: Flavio Brasil <fwbrasil@gmail.com>
Date: Thu, 29 Feb 2024 09:54:33 -0800
Subject: [PATCH] optimize uri parsing to reduce StringBuilder allocations

---
 core/src/main/scala/sttp/model/UriInterpolator.scala | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/core/src/main/scala/sttp/model/UriInterpolator.scala b/core/src/main/scala/sttp/model/UriInterpolator.scala
index 0481e494..fc02d7af 100644
--- a/core/src/main/scala/sttp/model/UriInterpolator.scala
+++ b/core/src/main/scala/sttp/model/UriInterpolator.scala
@@ -731,6 +731,16 @@ object UriInterpolator {
             case Singleton(ExpressionToken(s: Array[_])) =>
               b ++= s.flatMap(anyToStringOpt)
               doToSeq(tailTs)
+            case valueTs if(valueTs.size == 1) =>
+              // This case is equivalent to the next one but optimizes for the 
+              // frequent scenario where the sequence contains a single element.
+              valueTs.get(0) match {
+                case StringToken(s)     => b += decode(s, decodePlusAsSpace)
+                case ExpressionToken(e) => anyToStringOpt(e).foreach(b += _)
+                case EqInQuery          => b += "="
+                case _                  => 
+              }
+              doToSeq(tailTs)
             case valueTs =>
               val mbStr = valueTs mkStringOpt {
                 case StringToken(s)     => Some(decode(s, decodePlusAsSpace))