Catenary
I have found that the catenary can considerably slow everything up.
I needed some catenary that looked reasonable but did not use a great amount of computer memory. After several attempts this is the result.  
(The 2TSt. [2Track] is the same as 2T except the spacing is wider so as not to be near the platform edge.
3TW  [3Track wide] is the same as 3T except the spacing is wider for use in sidings etc.)
  I hope you find them acceptable.
Best wishes     Dado.

Static (
    Class           ( Catenary )
    Filename        ( Catenary1T.s )
    Align           ( None )
    Description     (Catenary-1T )
)
Static (
    Class           (Catenary )
    Filename        (Catenary2T.s )
    Align           ( None )
    Description     (Catenary-2T )
)
Static (
    Class           (Catenary )
    Filename        (Catenary2TSt.s )
    Align           ( None )
    Description     (Catenary-2TSt )
)
Static (
    Class           (Catenary )
    Filename        (Catenary3T.s )
    Align           ( None )
    Description     (Catenary-3T )
)
Static (
    Class           (Catenary )
    Filename        (Catenary3TW.s )
    Align           ( None )
    Description     (Catenary-3TW )
)
Static (
    Class           (Catenary )
    Filename        (Catenary4T.s )
    Align           ( None )
    Description     (Catenary-4T )
)
Static (
    Class           (Catenary )
    Filename        (Catenary5T.s )
    Align           ( None )
    Description     (Catenary-5T )
)
Static (
    Class           (Catenary)
    Filename        (Catenary6T.s )
    Align           ( None )
    Description     ( Catenary-6T )
)