[ https://issues.apache.org/jira/browse/OLINGO-1302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16651866#comment-16651866 ]
Scott Webster commented on OLINGO-1302: --------------------------------------- [~rareddy] Hi - Is the information I provided sufficient to allow you to further investigate where V4 performance improvements could be made? > Performance: Olingo V4 is slower than Olingo V2 when de-serializing JSON > response body > -------------------------------------------------------------------------------------- > > Key: OLINGO-1302 > URL: https://issues.apache.org/jira/browse/OLINGO-1302 > Project: Olingo > Issue Type: Bug > Components: odata4-client > Affects Versions: (Java) V4 4.4.0 > Reporter: Scott Webster > Priority: Critical > Labels: performance > Attachments: TestOlingoV4.Profiling.PNG, olingo-performance-test.zip > > > Olingo V4 is slower than Olingo V2 when de-serializing the JSON response body. > The following request to the OData V2 Microsoft NorthWind source returns 500 > records with 26 columns: > > [http://services.odata.org/V2/Northwind/Northwind.svc/Invoices?$top=500&$format=json] > The following request to the OData V4 Microsoft NorthWind source returns 500 > records with 26 columns: > > [http://services.odata.org/V4/Northwind/Northwind.svc/Invoices?$top=500&$format=json] > When parsing the V2 response by calling the EntityProvider.readFeed() method, > the elapsed time is approximately 180 ms. > When parsing the V4 response by calling the getODataEntitySet() method, the > elapsed time is approximately 320 ms. > I have attached a zipped up Eclipse project (olingo-performance-test) which > contains two Java programs (TestOlingoV2.java, TestOlingoV4.java). > These programs can be run to compare the performance of the JSON > deserialization in Olingo V2 and V4. > The Northwind metadata and the JSON response body are read from files > included in the project. > I have attached a snapshot image from a SAP Java Profiling tool showing > profiling on the TestOlingoV4 program. > > > -- This message was sent by Atlassian JIRA (v7.6.3#76005)