Really slow App and plugins on iOS

@Kyrax80 wrote:

Hello,

my App works almost perfectly on Android devices. It has acceptable (normal) performance.

But on iOS devices, even on an iPhone XS Max, the plugins are really slow.

I am checking if bluetooth, internet connection and gps are on and I have a spinner while all of this is being checked. Well, the spinner doesn’t even animate, it looks like a static image.

Also, on Xcode I am getting warning such as " THREAD WARNING: [‘Diagnostic_Location’] took ‘395.238037’ ms. Plugin should use a background thread.

I don’t know if the problem is when checking this stuff but this is my code incase this could be causing this performance issue:

private checkPreconditions(): void {
    this.platform.ready().then(() => {
      this.requestGPSPermissions();
  
      if (this.network.type == "none") {
        this.hasInternet = false;
        let connection = this.network.onConnect().subscribe(() => {
          this.hasInternet = true;
          if (!this.positioning) if (!this.positioning) {
            this.events.publish("precondition:set");
            this.events.publish("preconditioninit:set");
          }
          if (!(this.detector as ViewRef).destroyed) this.detector.detectChanges();
          connection.unsubscribe();
        });
      } else {
        this.hasInternet = true;
        if (!this.positioning) {
          this.events.publish("precondition:set");
          this.events.publish("preconditioninit:set");
        }
      }
  
      bluetoothSerial.isEnabled(() => {
        this.isBluetoothOn = true;
        if (!this.positioning) {
          this.events.publish("precondition:set");
          this.events.publish("preconditioninit:set");
        }
        if (!(this.detector as ViewRef).destroyed) this.detector.detectChanges();
      }, () => this.enableBluetooth());
  
      this.checkPreconditionsRunTime(true);
    });
  }

  public requestGPSPermissions(): void {
    this.platform.ready().then(() => {
      this.permissionsService.checkLocationPermissions().then(permissions => {
        this.hasGPSPermission = permissions;
  
        if (permissions) {
          if (!this.positioning) {
            this.events.publish("precondition:set");
            this.events.publish("preconditioninit:set");
          }
          this.diagnostic.isLocationEnabled().then(on => {
            this.isGPSOn = on;
  
            if (on) {
              if (!this.positioning) {
                this.events.publish("precondition:set");
                this.events.publish("preconditioninit:set");
              }
            }
            else this.turnGPSOn();
          })
        }
  
        if (!(this.detector as ViewRef).destroyed) this.detector.detectChanges();
      })
    })
  }

Is there any way to solve this? The way this is now my App is pretty useless

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