From 920120bbcec9f91df3336f62970b3e010a4fa6c2 Mon Sep 17 00:00:00 2001
From: Stefan Boberg <stefan.boberg@epicgames.com>
Date: Thu, 6 Mar 2025 16:18:32 +0100
Subject: reduced memory churn using fixed_xxx containers (#236)

* Added EASTL to help with eliminating memory allocations
* Applied EASTL to eliminate memory allocations, primarily by using `fixed_vector` et al to use stack allocations / inline struct allocations

Reduces memory events in traces by close to a factor of 10 in test scenario (starting editor for project F)
---
 src/zenhttp/httpserver.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/zenhttp/httpserver.cpp')

diff --git a/src/zenhttp/httpserver.cpp b/src/zenhttp/httpserver.cpp
index 1fbe22628..27a09f339 100644
--- a/src/zenhttp/httpserver.cpp
+++ b/src/zenhttp/httpserver.cpp
@@ -31,6 +31,8 @@
 #include <span>
 #include <string_view>
 
+#include <EASTL/fixed_vector.h>
+
 namespace zen {
 
 using namespace std::literals;
@@ -529,7 +531,7 @@ HttpServerRequest::WriteResponse(HttpResponseCode ResponseCode, HttpContentType
 {
 	std::span<const SharedBuffer> Segments = Payload.GetSegments();
 
-	std::vector<IoBuffer> Buffers;
+	eastl::fixed_vector<IoBuffer, 64> Buffers;
 	Buffers.reserve(Segments.size());
 
 	for (auto& Segment : Segments)
@@ -537,7 +539,7 @@ HttpServerRequest::WriteResponse(HttpResponseCode ResponseCode, HttpContentType
 		Buffers.push_back(Segment.AsIoBuffer());
 	}
 
-	WriteResponse(ResponseCode, ContentType, Buffers);
+	WriteResponse(ResponseCode, ContentType, std::span<IoBuffer>(begin(Buffers), end(Buffers)));
 }
 
 std::string
-- 
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