[gegl] NEWS: mention performance improvement to panorama-projection

[Øyvind Kolås <ok src gnome org>]

commit 8f6e74c85635e22f00a8ce0009def5cc93bca4b0
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed May 16 00:25:04 2018 +0200

    NEWS: mention performance improvement to panorama-projection

 docs/NEWS.txt |   23 ++++++++++++-----------
 1 files changed, 12 insertions(+), 11 deletions(-)
---
diff --git a/docs/NEWS.txt b/docs/NEWS.txt
index 34025cf..9542133 100644
--- a/docs/NEWS.txt
+++ b/docs/NEWS.txt
@@ -7,19 +7,9 @@ Build
 Abort early if autoreconf fails, remove unused bits, default to -Ofast as
 CFLAGS.
 
-Core
-~~~~
-
-Operations
+GeglBuffer
 ~~~~~~~~~~
 
-operation: add GeglOperationAreaFilter::get_abyss_policy() vfunc
-Copyright notice improvements to spherize, color-overlay.
-ff-save: implement defines handling compilation with ffmpeg 2.3-2.7, 4.0 compat
-
-Buffer
-~~~~~~
-
 Improve concurrency for trimming and destruction of tile caches. Improve cache
 invalidation during partial mipmap regeneration.
 
@@ -32,6 +22,17 @@ API still exists, though parts of it is now deprecated. The single special case
 where gegl_buffer_sample remains somewhat performant is with the NEAREST
 sampler, for all other samplers creating a caching sampler is better.
 
+Operations
+~~~~~~~~~~
+
+operation: add GeglOperationAreaFilter::get_abyss_policy() vfunc Copyright
+notice improvements to spherize, color-overlay.  ff-save: implement defines
+handling compilation with ffmpeg 2.3-2.7, 4.0 compat.
+
+Improved multi-threaded performance of panorama-projection and other
+transformation operations through optimizations in buffer and base-classes.
+
+
 Contributors
 ~~~~~~~~~~~~