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Sowmya YakkalaSowmya Yakkala 

Using Lightning decreases System performance Why??

When i am Lightning, System performance was becoming low why can i know the reason 
Rounak SharmaRounak Sharma
Hello Sowmya,
Lightning is still in building phase that is one reason and also lightning uses Cache which slows down the browser. These may be the conditions.

Please let me know if have any other doubt.
Khan AnasKhan Anas (Salesforce Developers) 
Hi Sowmya,

Greetings to you!

If you are experiencing slow page-loading times when using Lightning Experience, it may be related to one or more of the following issue types.
  • Geographical
  • Device
  • Browser
  • Salesforce organization configuration issues
Please review issue descriptions and mitigation strategies in below knowledge article to improve the performance of your Salesforce organization for Lightning Users. (

Also, please refer to below links:

I hope it helps you.

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future. It will help to keep this community clean.

Thanks and Regards,
Khan Anas