Contacts which respond to changes in the pointer position may find it difficult to keep up with a rapidly-moving mouse and, in fact, may not need to recognize every individual motion event. Initializing the <#2299#>compress-motion<#2299#> slot to <#2300#>:on<#2300#> will cause all but the last in a sequence of consecutive <#2301#>:motion-notify<#2301#> events to be ignored, with only the most recent event being dispatched to the contact.
Simple contacts may find it more efficient always to display the entire contact
image, ignoring <#2302#>x<#2302#>, <#2303#>y<#2303#>, <#2304#>width<#2304#>, and <#2305#>height<#2305#> arguments
to the <#2306#>display<#2306#> method.
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