progress meter: add disabled code for a more stable ETA
Compiles to ~25 bytes if enabled.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/progress.c b/libbb/progress.c
index f1d980d..23e974c 100644
--- a/libbb/progress.c
+++ b/libbb/progress.c
@@ -57,6 +57,9 @@
p->last_update_sec = p->start_sec;
p->last_change_sec = p->start_sec;
p->last_size = 0;
+#if 0
+ p->last_eta = INT_MAX;
+#endif
}
/* File already had beg_size bytes.
@@ -192,6 +195,16 @@
/* if 32bit, can overflow ^^^^^^^^^^, but this would only show bad ETA */
if (eta >= 1000*60*60)
eta = 1000*60*60 - 1;
+#if 0
+ /* To prevent annoying "back-and-forth" estimation jitter,
+ * if new ETA is larger than the last just by a few seconds,
+ * disregard it, and show last one. The end result is that
+ * ETA usually only decreases, unless download slows down a lot.
+ */
+ if ((unsigned)(eta - p->last_eta) < 10)
+ eta = p->last_eta;
+ p->last_eta = eta;
+#endif
secs = eta % 3600;
hours = eta / 3600;
fprintf(stderr, "%3u:%02u:%02u ETA", hours, secs / 60, secs % 60);