3824 - experiment: stop buffering in termbox

Now it's much more apparent why things are slow. You can see each repaint
happening. Already I fixed one performance bug -- in clear-rest-of-screen.

Since this subverts Mu's fake screen there may be bugs.

Another salubrious side effect: I've finally internalized that switching
to raw mode doesn't have to clear the screen. That was just an artifact
of how termbox abstracted operations. Now I can conceive of using termbox
to build a repl as well.

(I was inspired to poke into termbox internals by
http://viewsourcecode.org/snaptoken/kilo and
https://github.com/antirez/linenoise)

1 files changed, 0 insertions, 4 deletions

diff --git a/sandbox/005-sandbox.mu b/sandbox/005-sandbox.mu
index badd0d46..91826802 100644
--- a/sandbox/005-sandbox.mu
+++ b/sandbox/005-sandbox.mu
@@ -793,9 +793,7 @@ after <global-keypress> [
       render-from <- add render-from, 1
       *env <- put *env, render-from:offset, render-from
     }
-    hide-screen screen
     screen <- render-sandbox-side screen, env, render
-    show-screen screen
     jump +finish-event
   }
 ]
@@ -822,9 +820,7 @@ after <global-keypress> [
     break-if at-beginning?
     render-from <- subtract render-from, 1
     *env <- put *env, render-from:offset, render-from
-    hide-screen screen
     screen <- render-sandbox-side screen, env, render
-    show-screen screen
     jump +finish-event
   }
 ]