From ddbbc61339fe76f5f2bbffae752cef322d304d52 Mon Sep 17 00:00:00 2001
From: guoling <guoling@tencent.com>
Date: Wed, 21 Nov 2018 10:59:48 +0800
Subject: [PATCH] use average item size to calc future usage

---
 Android/MMKV/mmkv/src/main/cpp/MMKV.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Android/MMKV/mmkv/src/main/cpp/MMKV.cpp b/Android/MMKV/mmkv/src/main/cpp/MMKV.cpp
index 6c0a48af..2e03f57c 100644
--- a/Android/MMKV/mmkv/src/main/cpp/MMKV.cpp
+++ b/Android/MMKV/mmkv/src/main/cpp/MMKV.cpp
@@ -660,7 +660,8 @@ bool MMKV::ensureMemorySize(size_t newSize) {
                 return false;
             }
         } else {
-            size_t futureUsage = newSize * std::max<size_t>(8, (m_dic.size() + 1) / 2);
+            size_t avgItemSize = lenNeeded / m_dic.size();
+            size_t futureUsage = avgItemSize * std::max<size_t>(8, (m_dic.size() + 1) / 2);
             // 1. no space for a full rewrite, double it
             // 2. or space is not large enough for future usage, double it to avoid frequently full rewrite
             if (lenNeeded >= m_size || (lenNeeded + futureUsage) >= m_size) {