From ac6cb82b065d24e2691dd8ad430f6a8159861550 Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Sun, 21 Jan 2018 14:33:43 -0800
Subject: [PATCH] avoid shrinking if using the bootstrap buffer

---
 buffer.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/buffer.go b/buffer.go
index 98a5c8b..364722b 100644
--- a/buffer.go
+++ b/buffer.go
@@ -253,11 +253,18 @@ func (b *Buffer) Read(buf []byte) (int, error) {
 }
 
 func (b *Buffer) shrink() {
+	c := b.Cap()
+	// Either nil or bootstrap.
+	if c <= len(b.bootstrap) {
+		return
+	}
+
 	l := b.Len()
 	if l == 0 {
+		// Shortcut if empty.
 		b.returnBuf()
 		b.rOff = 0
-	} else if l*8 < b.Cap() {
+	} else if l*8 < c {
 		// Only shrink when capacity > 8x length. Avoids shrinking too aggressively.
 		newBuf := b.getBuf(l)
 		copy(newBuf, b.buf[b.rOff:])
-- 
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