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Author's profile photo Gary Long

A Tip For Improving SAPUI5 Application Loading Performance


When developing SAPUI5 application, there is a tip that can improve performance. I’d like to share it with you.

There is one configuration param in the manifast.json file.


	"sap.ui5": {
		"flexEnabled": false,
		"rootView": {
			"viewName": "",
			"type": "XML",
			"async": true,
			"id": "View1"
		"dependencies": {
			"minUI5Version": "1.65.6",
			"libs": {
				"sap.ui.layout": {},
				"sap.ui.core": {},
				"sap.m": {}

If you use the SAP Web IDE to create the SAPUI5 application. In the manifest.json file. you will found the code snippet above.

So How to Improve the Performance by using the param?

Let’s empty the libs params.

"dependencies": {
	"minUI5Version": "1.65.6",
	"libs": {

And then run the SAPUI5 template application which created by the SAP Web IDE.

So finally the page loading will send 88 requests, and many of the requests are the SAPUI5 component JavaScript files.

Then we set the libs in the manifast.json file:

"dependencies": {
	"minUI5Version": "1.65.6",
	"libs": {
		"sap.m": {}

Run the application again:

The network only have 30 requests now, and the time save 3 seconds.

What happen?

Base on the requests we can see we don’t have any request for the SAPUI5 components.And there is a new request “libray-preload.js” come out.

The fully request url is

Go back to our view.xml page:

<mvc:View controllerName="" xmlns:mvc="sap.ui.core.mvc" displayBlock="true" xmlns="sap.m">
	<Shell id="shell">
		<App id="app">
				<Page id="page" title="{i18n>title}">

In this page we found that we are use these components are all in sap.m page.


If we put the libs in the manifest.json file. when the page start loading, it will load the libray-preload.js instead of the component’s own js file. And if are the components’s lib which we used in our code are all defined the lib in the “sap.ui5.dependencies.libs” ,it can help us to save the network request to increasing the loading performance.

Hope you like it.



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      Author's profile photo Daniel Chen
      Daniel Chen


      Author's profile photo Zayidu Ansari
      Zayidu Ansari

      Thanks, Nice one!

      Author's profile photo FAZAL BASHEER

      Good one!

      Author's profile photo Nitin Mahajan
      Nitin Mahajan

      Interesting view. However just trying to understand better.

      What exactly is this preload of libs doing? is it restricting the load to only sap.m libs? what are we losing by specifically mentioning sap.m in libs load?

      If you look at the second screenshot, though it saved 2.5 sec and reduced number of requests, the total amount of data transferred has actually gone up and also the DOM content size has gone up. Have you evaluated the impact of that?




      Author's profile photo Javier Andres Caceres Moreno
      Javier Andres Caceres Moreno


      Author's profile photo Ray Lv
      Ray Lv

      super Gary

      Author's profile photo Min Zhuo
      Min Zhuo

      Bravo! Gary!

      Author's profile photo Wei Shen
      Wei Shen


      Author's profile photo Dominik Meier
      Dominik Meier

      Big thx!

      Author's profile photo HeshuAcademy SAPUI5
      HeshuAcademy SAPUI5

      Thanks for the post.



      Author's profile photo Jerome Zhao
      Jerome Zhao


      Author's profile photo James Gs
      James Gs