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Ensure gm perf tests actually resize. Prevent coredump when embeding pre-shrunk image within same dimensions.

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Lovell Fuller
2014-01-21 22:48:33 +00:00
parent d509458ba1
commit 377662fffc
3 changed files with 66 additions and 53 deletions
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README.md
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@@ -9,9 +9,9 @@ _adj_
The typical use case for this high speed Node.js module is to convert large JPEG and PNG images to smaller JPEG and PNG images of varying dimensions.
Under the hood you'll find the blazingly fast [libvips](https://github.com/jcupitt/libvips) image processing library, originally created in 1989 at Birkbeck College and currently maintained by John Cupitt.
The performance of JPEG resizing is typically 15x-25x faster than ImageMagick and GraphicsMagick, based mainly on the number of CPU cores available.
Performance is up to 18x faster than ImageMagick and up to 8x faster than GraphicsMagick, based mainly on the number of CPU cores available.
Under the hood you'll find the blazingly fast [libvips](https://github.com/jcupitt/libvips) image processing library, originally created in 1989 at Birkbeck College and currently maintained by John Cupitt.
## Prerequisites
@@ -119,35 +119,35 @@ Test environment:
### JPEG
* imagemagick x 5.50 ops/sec ±0.48% (31 runs sampled)
* gm-file-file x 11.19 ops/sec ±0.51% (57 runs sampled)
* gm-file-buffer x 11.11 ops/sec ±0.42% (57 runs sampled)
* epeg-file-file x 28.59 ops/sec ±0.09% (71 runs sampled)
* epeg-file-buffer x 28.67 ops/sec ±0.14% (71 runs sampled)
* imagemagick x 5.53 ops/sec ±0.62% (31 runs sampled)
* gm-file-file x 4.10 ops/sec ±0.41% (25 runs sampled)
* gm-file-buffer x 4.10 ops/sec ±0.36% (25 runs sampled)
* epeg-file-file x 23.82 ops/sec ±0.18% (60 runs sampled)
* epeg-file-buffer x 23.98 ops/sec ±0.16% (61 runs sampled)
* sharp-buffer-file x 24.72 ops/sec ±0.42% (62 runs sampled)
* sharp-buffer-buffer x 24.24 ops/sec ±0.36% (61 runs sampled)
* sharp-file-file x 97.15 ops/sec ±0.44% (80 runs sampled)
* sharp-file-buffer x __98.51 ops/sec__ ±0.42% (80 runs sampled)
* sharp-buffer-file x 20.76 ops/sec ±0.55% (54 runs sampled)
* sharp-buffer-buffer x 20.90 ops/sec ±0.26% (54 runs sampled)
* sharp-file-file x 91.78 ops/sec ±0.38% (88 runs sampled)
* sharp-file-buffer x __93.05 ops/sec__ ±0.61% (76 runs sampled)
* sharp-file-buffer-sharpen x 56.99 ops/sec ±5.43% (57 runs sampled)
* sharp-file-buffer-progressive x 64.89 ops/sec ±0.42% (79 runs sampled)
* sharp-file-buffer-sequentialRead x 64.13 ops/sec ±0.40% (78 runs sampled)
* sharp-file-buffer-sharpen x 63.09 ops/sec ±5.58% (63 runs sampled)
* sharp-file-buffer-progressive x 61.68 ops/sec ±0.53% (76 runs sampled)
* sharp-file-buffer-sequentialRead x 60.66 ops/sec ±0.38% (75 runs sampled)
### PNG
* imagemagick x 4.31 ops/sec ±0.27% (26 runs sampled)
* gm-file-file x 17.89 ops/sec ±0.21% (86 runs sampled)
* gm-file-buffer x 14.74 ops/sec ±0.15% (73 runs sampled)
* imagemagick x 4.27 ops/sec ±0.21% (25 runs sampled)
* gm-file-file x 8.33 ops/sec ±0.19% (44 runs sampled)
* gm-file-buffer x 7.45 ops/sec ±0.16% (40 runs sampled)
* sharp-buffer-file x 4.97 ops/sec ±120.47% (26 runs sampled)
* sharp-buffer-buffer x 13.00 ops/sec ±0.53% (65 runs sampled)
* sharp-file-file x 53.00 ops/sec ±7.15% (88 runs sampled)
* sharp-file-buffer x __55.43 ops/sec__ ±0.65% (89 runs sampled)
* sharp-file-buffer-sharpen x 45.37 ops/sec ±0.38% (74 runs sampled)
* sharp-file-buffer-progressive x 55.49 ops/sec ±0.45% (89 runs sampled)
* sharp-file-buffer-sequentialRead x 32.27 ops/sec ±0.29% (79 runs sampled)
* sharp-buffer-file x 4.94 ops/sec ±118.46% (26 runs sampled)
* sharp-buffer-buffer x 12.59 ops/sec ±0.55% (64 runs sampled)
* sharp-file-file x 44.06 ops/sec ±6.86% (75 runs sampled)
* sharp-file-buffer x __46.29 ops/sec__ ±0.38% (76 runs sampled)
* sharp-file-buffer-sharpen x 38.86 ops/sec ±0.22% (65 runs sampled)
* sharp-file-buffer-progressive x 46.35 ops/sec ±0.20% (76 runs sampled)
* sharp-file-buffer-sequentialRead x 29.02 ops/sec ±0.62% (72 runs sampled)
## Licence