treatRawData and treatRawStream: Get values more efficiently with Object.values

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) {