From 22a03931ae46d0decc068e8d1ffe83e6187ed812 Mon Sep 17 00:00:00 2001
From: WeidiDeng <weidi_deng@icloud.com>
Date: Sat, 24 Aug 2024 01:04:18 +0800
Subject: [PATCH] prefetch immediately if matchers requires more data and if
 not already prefecthed (#239)

---
 layer4/routes.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/layer4/routes.go b/layer4/routes.go
index 9d3ff75..b8ac942 100644
--- a/layer4/routes.go
+++ b/layer4/routes.go
@@ -157,6 +157,10 @@ func (routes RouteList) Compile(logger *zap.Logger, matchingTimeout time.Duratio
 				if errors.Is(err, ErrConsumedAllPrefetchedBytes) {
 					lastNeedsMoreIdx = i
 					routesStatus[i] = routeNeedsMore
+					// the first time a matcher requires more data, exit the loop to force a prefetch
+					if !matcherNeedMore {
+						break
+					}
 					continue // ignore and try next route
 				}
 				if err != nil {