xcall MIAMEX, MX_SETSW, waitms
(UNIX only) MX_SETSW (MAIMEX 102) allows you to change the swap key wait time for certain terminal drivers (normally set by the SWAPWAIT property of miame.ini, or 1000 ms by default). Currently this only affects the wyse50 driver, and was implemented because the standard wait is a full 1 second, which is apparently necessary on some versions of the terminal but not on terminal emulators. The main downside of the extra wait occurs within PolyShell, where it delayed the repaint of the new screen when swapping sessions. To allow this to remain as flexible as possible, the default value of zero simply causes the terminal driver to use its normal wait time (which in the case of wyse50 is 1000 milliseconds or 1 second). To minimize the wait, set it to 1.
waitms (Num) should be set to the desired wait time in milliseconds, or zero to use the default.