Higher resolutions increase the time that is needed for laser engraving.
To reduce engraving time a different resolution can be selected. Using large-scale laser engravings as the example, choose a lower resolution and compensate for the resulting line spacing with a higher Z offset value.
Consistent laser engraving result - 1/4 of the original processing time
The following example shows how you can engrave the same graphic at 500dpi with the same result at 125 dpi, produced in 1/4 of the time: