diff --git a/lib/persistence.js b/lib/persistence.js
index 4839693..538e523 100755
--- a/lib/persistence.js
+++ b/lib/persistence.js
@@ -156,7 +156,6 @@ class Persistence {
   treatRawData (rawData) {
     const data = rawData.split('\n')
     const dataById = {}
-    const tdata = []
     const indexes = {}
 
     // Last line of every data file is usually blank so not really corrupt
@@ -181,7 +180,7 @@ class Persistence {
       corruptItems / data.length > this.corruptAlertThreshold
     ) throw new Error(`More than ${Math.floor(100 * this.corruptAlertThreshold)}% of the data file is corrupt, the wrong beforeDeserialization hook may be used. Cautiously refusing to start NeDB to prevent dataloss`)
 
-    tdata.push(...Object.values(dataById))
+    const tdata = Object.values(dataById)
 
     return { data: tdata, indexes: indexes }
   }
@@ -192,7 +191,6 @@ class Persistence {
    */
   treatRawStream (rawStream, cb) {
     const dataById = {}
-    const tdata = []
     const indexes = {}
 
     // Last line of every data file is usually blank so not really corrupt
@@ -224,11 +222,9 @@ class Persistence {
         return
       }
 
-      Object.keys(dataById).forEach(function (k) {
-        tdata.push(dataById[k])
-      })
+      const data = Object.values(dataById)
 
-      cb(null, { data: tdata, indexes: indexes })
+      cb(null, { data, indexes: indexes })
     })
 
     lineStream.on('error', function (err) {
diff --git a/test/persistence.test.js b/test/persistence.test.js
index ec35f02..5fa46e1 100755
--- a/test/persistence.test.js
+++ b/test/persistence.test.js
@@ -282,7 +282,7 @@ describe('Persistence', function () {
       const treatedData = result.data
       const indexes = result.indexes
       Object.keys(indexes).length.should.equal(1)
-      assert.deepEqual(indexes.test, { fieldName: 'test', unique: true })
+      assert.deepStrictEqual(indexes.test, { fieldName: 'test', unique: true })
 
       treatedData.sort(function (a, b) { return a._id - b._id })
       treatedData.length.should.equal(2)