notes

2016-03-21 11:36:15 +00:00 · 2016-03-21 11:36:15 +00:00 · 385f8a167f
parent 063706f300
commit 385f8a167f
1 changed files with 3 additions and 11 deletions
--- a/14
+++ b/14
@ -1,18 +1,10 @@
- try orc version of reducev? and shrinkv? maybe shrinkh?
+- look at reduceh_gen now

 	valgrind --tool=callgrind vipsthumbnail wtc.jpg -s 2000 --vips-info

 	self	called
-	54%	256	reducev_gen
-	25%	256	reduceh_gen
-	18%	loads	various jpeg decode
-
- orc reducev could squeeze out zeros
-
- could we read and write the same place in orc? could save having two temp
-  buffers and swapping
-
-	nope! disallowed
+	41%	125	reduceh_gen
+	25%	loads	various jpeg decode

 - could instrument vips_region_prepare() and track number of pixels calculated
  for each image ... on image close (or evelend?) print %computed, values over