Preliminary solution to the stuttering problem.

1 files changed, 24 insertions, 3 deletions

diff --git a/st.c b/st.c
index 12d6665..da6f17e 100644
--- a/st.c
+++ b/st.c
@@ -48,7 +48,7 @@
 #define ESC_ARG_SIZ   16
 #define STR_BUF_SIZ   256
 #define STR_ARG_SIZ   16
-#define DRAW_BUF_SIZ  1024
+#define DRAW_BUF_SIZ  20*1024
 #define UTF_SIZ       4
 #define XK_NO_MOD     UINT_MAX
 #define XK_ANY_MOD    0
@@ -2329,7 +2329,8 @@ void
 run(void) {
         XEvent ev;
         fd_set rfd;
-        int xfd = XConnectionNumber(xw.dpy);
+        int xfd = XConnectionNumber(xw.dpy), i;
+        struct timeval drawtimeout;
 
         for(;;) {
                 FD_ZERO(&rfd);
@@ -2340,9 +2341,29 @@ run(void) {
                                 continue;
                         die("select failed: %s\n", SERRNO);
                 }
-                if(FD_ISSET(cmdfd, &rfd))
+
+                /*
+                 * Stop after a certain number of reads so the user does not
+                 * feel like the system is stuttering.
+                 */
+                for(i = 0; i < 1000 && FD_ISSET(cmdfd, &rfd); i++) {
                         ttyread();
 
+                        FD_ZERO(&rfd);
+                        FD_SET(cmdfd, &rfd);
+                        /*
+                         * Just wait a bit so it isn't disturbing the
+                         * user and the system is able to write something.
+                         */
+                        drawtimeout.tv_sec = 0;
+                        drawtimeout.tv_usec = 5;
+                        if(select(cmdfd+1, &rfd, NULL, NULL, &drawtimeout) < 0) {
+                                if(errno == EINTR)
+                                        continue;
+                                die("select failed: %s\n", SERRNO);
+                        }
+                }
+
                 while(XPending(xw.dpy)) {
                         XNextEvent(xw.dpy, &ev);
                         if(XFilterEvent(&ev, xw.win))