More time taken for finding the elements in xPath

[DivyaPamarthi]

Please find the sample Xpath below for our application.

MainWindow --> TopBar --> MainMenu --> Tools

Webelement = MainWindow -> TopBar (ControlType.Pane)
Webelement1 = WebElement -> MainMenu (ControlType.MenuBar)
Webelement2 = Webelement1 -> Tools (ControlType.MenuItem)

There are 2 webelements as highlighted above for which xpath is more or else similiar.
But the time taken to Webelement1 is 1 seconds, whereas to find Webelement2 it is taking more than 15 seconds.

Webelement1 Code: (Time ~ 1 second)

log.info 'Finding Main Menu'
WebElement Webelement1 = topBar.findElement(By.xpath("./*[${controlTypeEquals(ControlType.MenuBar)} and ${nameEquals('Main Menu')}]"))

Webelement2 Code: (Time ~ 15 seconds)
menuName ="Tools"
log.info 'Finding MenuItem'
WebElement Webelement2= Webelement1.findElement(By.xpath("./*[${controlTypeEquals(ControlType.MenuItem)} and ${nameEquals(menuName)}]"))

Both Webelement1 & Webelement2 are nearly performing same actions. But considering the time taken to find the webelement is having huge difference.
For Webelement1, it takes just a second - whereas for Webelement2 it takes nearly 15 seconds, which is huge for a test automation code.

Could you please help if something is done wrong here and anyway to reduce the timing.