tag/Builder: reserve room in std::vector in default constructor

This reduces resource waste for resizing the std::vector in most cases.

tag/Builder: reserve room in std::vector in default constructor
ae5b2643 · Max Kellermann · 02556ffc · ae5b2643
Commit ae5b2643 authored Apr 24, 2020 by Max Kellermann
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Builder.hxx src/tag/Builder.hxx +3 -1

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--- a/src/tag/Builder.hxx
+++ b/src/tag/Builder.hxx
@@ -54,7 +54,9 @@ public:
 	/**
 	 * Create an empty tag.
 	 */
-	TagBuilder() = default;
+	TagBuilder() noexcept {
+		items.reserve(64);
+	}
 	~TagBuilder() noexcept {
 		Clear();