Speed Differences

Operation	Original Library (ms)	SSeltzer Library (ms)	Gain (ms)	Gain (%)
Reset/Init/Screen fill Black	974	168	806	82.8%
testtext(RED);	695	229	466	67.1%
testlines(CYAN);	12846	4059	8787	68.4%
testfastlines(RED, BLUE);	800	251	549	68.6%
testdrawrects(GREEN);	725	225	500	69.0%
testfillrects(YELLOW, MAGENTA);	6946	2617	4329	62.3%
testfillcircles(10, MAGENTA);	1473	675	798	54.2%
testdrawcircles(10, WHITE);	1115	383	732	65.7%
testtriangles();	1409	435	974	69.1%
testfilltriangles();	3938	1601	2337	59.3%
testRoundRect();	1031	330	701	68.0%
testFillRoundRect();	7549	2881	4668	61.8%
Total:	39501	13854	25647	64.9%

All tests performed with the following code:

tft.reset();									
tft.initDisplay();									
startTime = millis();									
<TEST OPERATION>									
endTime = millis();									
tft.setCursor(10, 100);
tft.setTextSize(2);
tft.println(endTime - startTime);

Note that many of the tests begin with tft.fillScreen(BLACK); While this does not reflect the actual time it takes to perform many screen draw operations themselves, it does give a real world feel for how long it would take to display a complex screen. Of course you would want to optimize and only draw certain portions of the screen at a time (more on that later).

Home