NavContorller functionality is very slow while push and pop

While navigating from one page another page I used the below code :

goToDetails(name: string, phone:number, email:string, desc:string, img_path:string) {
this.navCtrl.push(MemberDetailsPage, {name, phone, email, desc, img_path});

After that while going to previous page also the event is calling lately(Default back button provided by Ionic)

Could you please guys please provide any solution for that?