use environment value to control benchmark mode

Change-Id: I417583701fdc24f846c684924fef4dfa4becb259
reduce render fps and data update fps to half

Change-Id: Ibb8b57577696e582c05ac0ea372385373e3444de
place date update fps below render fps

Change-Id: I18edebf6fe3c323fec2f6190b00bdc6b5d76c4bc
add screen text color set interface

Change-Id: I2407166368b55b973c70a2edc377785b82d8481b
modify data update color to cyan

Change-Id: I61dd4fac1e93e3b6255f31585b19f0182cb45b97
modify data update fps to data update rate

Change-Id: I9654fb02a1481b679d98359424e272cc4a706464
modify history data style

Change-Id: I1a86ff55805e88cc559795139c7f8f84d3fb5109
showing bar info until fly back

Change-Id: Idc13f652d359baf2c91758ee1efd5b908b4b9483
correct the variable name

Change-Id: I053c99c1b544fd64951c42ebe1c232cd1768e79f
don't call getenv repeatedly

Change-Id: I90b8e30ffd095cc3fa20938cd15adf4d217bb6e1