[hackers] [blind] update todo: tee is too slow || Mattias Andrée

[git]

commit d8aa45da86d1128149fd7ab6ac3725bf8e88a1b1
Author:     Mattias Andrée <maand...@kth.se>
AuthorDate: Mon Dec 4 22:35:59 2017 +0100
Commit:     Mattias Andrée <maand...@kth.se>
CommitDate: Mon Dec 4 22:35:59 2017 +0100

    update todo: tee is too slow
    
    Signed-off-by: Mattias Andrée <maand...@kth.se>

diff --git a/TODO b/TODO
index b0bbde7..408e942 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,7 @@
+blind-tee (and tee(1)) is too slow (bottleneck) and must be reimplemented
+using tee(2) and splice(2). cat(1) may also be too slow, if this is the
+case, add blind-splice that just copies stdin to stdout using splice(2).
+
 blind-transform                affine transformation by matrix multiplication, 
-[xy] for tiling, -s for
                                improve quality on downscaling (pixels' 
neighbours must not change)
 blind-apply-map                remap pixels (distortion) using the X and Y 
values, -[xy] for tiling, -s for