diff --git a/bin/types/alotofkeys.json b/bin/types/alotofkeys.json
new file mode 100644
index 0000000..3fc052e
Binary files /dev/null and b/bin/types/alotofkeys.json differ
diff --git a/test/perftest/perftest.h b/test/perftest/perftest.h
index a83a6ed..31e3ca6 100644
--- a/test/perftest/perftest.h
+++ b/test/perftest/perftest.h
@@ -130,7 +130,8 @@ public:
                 "integers.json",
                 "mixed.json",
                 "nulls.json",
-                "paragraphs.json"
+                "paragraphs.json",
+                "alotofkeys.json"
             };
 
             for (size_t j = 0; j < sizeof(typesfilenames) / sizeof(typesfilenames[0]); j++) {
@@ -158,7 +159,7 @@ public:
         free(whitespace_);
         json_ = 0;
         whitespace_ = 0;
-        for (size_t i = 0; i < 7; i++) {
+        for (size_t i = 0; i < 8; i++) {
             free(types_[i]);
             types_[i] = 0;
         }
@@ -174,8 +175,8 @@ protected:
     size_t length_;
     char *whitespace_;
     size_t whitespace_length_;
-    char *types_[7];
-    size_t typesLength_[7];
+    char *types_[8];
+    size_t typesLength_[8];
 
     static const size_t kTrialCount = 1000;
 };
diff --git a/test/perftest/rapidjsontest.cpp b/test/perftest/rapidjsontest.cpp
index 24e7120..ce41c10 100644
--- a/test/perftest/rapidjsontest.cpp
+++ b/test/perftest/rapidjsontest.cpp
@@ -26,6 +26,7 @@
 #include "rapidjson/memorystream.h"
 
 #include <fstream>
+#include <vector>
 
 #ifdef RAPIDJSON_SSE2
 #define SIMD_SUFFIX(name) name##_SSE2
@@ -52,7 +53,7 @@ public:
         // Parse as a document
         EXPECT_FALSE(doc_.Parse(json_).HasParseError());
 
-        for (size_t i = 0; i < 7; i++)
+        for (size_t i = 0; i < 8; i++)
             EXPECT_FALSE(typesDoc_[i].Parse(types_[i]).HasParseError());
     }
 
@@ -68,7 +69,7 @@ private:
 protected:
     char *temp_;
     Document doc_;
-    Document typesDoc_[7];
+    Document typesDoc_[8];
 };
 
 TEST_F(RapidJson, SIMD_SUFFIX(ReaderParseInsitu_DummyHandler)) {
@@ -335,6 +336,23 @@ TEST_F(RapidJson, DocumentAccept) {
     }
 }
 
+TEST_F(RapidJson, DocumentFind) {
+    typedef Document::ValueType ValueType;
+    typedef ValueType::ConstMemberIterator ConstMemberIterator;
+    const Document &doc = typesDoc_[7]; // alotofkeys.json
+    if (doc.IsObject()) {
+        std::vector<const ValueType*> keys;
+        for (ConstMemberIterator it = doc.MemberBegin(); it != doc.MemberEnd(); ++it) {
+            keys.push_back(&it->name);
+        }
+        for (size_t i = 0; i < kTrialCount; i++) {
+            for (size_t j = 0; j < keys.size(); j++) {
+                EXPECT_TRUE(doc.FindMember(*keys[j]) != doc.MemberEnd());
+            }
+        }
+    }
+}
+
 struct NullStream {
     typedef char Ch;