vipsthumbnail takes 14 seconds for one tiff file #1784
Description
Describe the bug
vipsthumbnail CMU-1.tiff with libvips 8.10.0 takes 14 seconds to save its thumbnail while libvips 8.9.2 saves in 0.004sec.
To Reproduce
- Use Image CMU-1.tiff or another one (both reproduce the bug)
- Install libglib2.0-dev libexpat1-dev libtiff5-dev libjpeg62-turbo-dev libgsf-1-dev openslide-tools libpng-dev
- Install vips8.10.0 from tarball
stdout of "vips --vips-config"
native win32: no
native OS X: no
open files in binary mode: no
enable debug: no
enable deprecated library components: yes
enable docs with gtkdoc: no
gobject introspection: no
enable radiance support: yes
enable analyze support: yes
enable PPM support: yes
use fftw3 for FFT: no
Magick package: none
Magick API version: none
load with libMagick: no
save with libMagick: no
accelerate loops with orc: no
ICC profile support with lcms: no
file import with niftiio: no
file import with libheif: no
file import with OpenEXR: no
file import with OpenSlide: no
file import with matio: no
PDF import with PDFium: no
PDF import with poppler-glib: no
SVG import with librsvg-2.0: no
zlib: yes
file import with cfitsio: no
file import/export with libwebp: no
text rendering with pangoft2: no
file import/export with libspng: no
file import/export with libpng: yes (pkg-config libpng >= 1.2.9)
support 8bpp PNG quantisation: no
file import/export with libtiff: yes (pkg-config libtiff-4)
file import/export with giflib: no
file import/export with libjpeg: yes (pkg-config)
image pyramid export: yes
use libexif to load/save JPEG metadata: no
- Run the command
vipsthumbnail CMU-1.tiff
Expected behavior
Saves thumbnail image data to disk in a moment.
Actual behavior
vipsthumbnail takes about 14 sec to save "tn_CMU-1.jpg". With "--vips-progress" argument, stdout is like below.
$ vipsthumbnail CMU-1.tiff --vips-progress
vipsthumbnail temp-21: 128 x 92 pixels, 36 threads, 128 x 128 tiles, 640 lines in buffer
vipsthumbnail temp-21: done in 14.4s
Environment
- OS: Debian 10
- Vips: 8.10.0
Additional context
- After reinstalling libvips8.9.2, vipsthumbnail worked perfectly.
- tiles are 128 x 128 with 8.10.0, but 128 x 16 with 8.9.2.
# with libvips8.9.2
$ vipsthumbnail CMU-1.tiff --vips-progress
vipsthumbnail temp-24: 128 x 92 pixels, 36 threads, 128 x 16 tiles, 640 lines in buffer
vipsthumbnail temp-24: done in 0.00452s
pyvips.Image.thumbnail("CMU-1.tiff", 128)finishes less than a second with both libvips8.10.0 and libvips8.9.2.pyvips.Image.thumbnail("CMU-1.tiff", 128).jpegsave("thumb.jpg")finishes in 14 second with libvips8.10.0.