sharp - npm Package Compare versions

Comparing version 0.0.1 to 0.0.2

package.json

 {
   "name": "sharp",
-  "version": "0.0.1",
-  "main": "./build/Release/sharp",
+  "version": "0.0.2",
+  "main": "index.js",
   "description": "High performance Node.js module to resize JPEG images using the libvips image processing library",
@@ -11,3 +11,4 @@ "repository": {
   "devDependencies": {
-    "imagemagick": "*"
+    "imagemagick": "*",
+    "benchmark": "*"
   },
@@ -24,7 +25,7 @@ "scripts": {
     "thumbnail",
-	"sharpen",
-	"crop",
-	"embed",
+    "sharpen",
+    "crop",
+    "embed",
     "libvips",
-	"fast"
+    "fast"
   ],
@@ -31,0 +32,0 @@ "author": "Lovell Fuller",

README.md

@@ -14,4 +14,6 @@ # sharp
 
-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 the University of Southampton. Speed is typically 25-30% faster than the imagemagick equivalent.
+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 the University of Southampton.
 
+Speed is typically 4x faster than the imagemagick equivalent.
+
 ## Prerequisites
@@ -30,3 +32,3 @@
 
-Ubuntu 13.04:
+Ubuntu 13.04 (64-bit):
 
@@ -41,4 +43,11 @@ sudo ln -s /usr/lib/x86_64-linux-gnu/pkgconfig/vips-7.28.pc /usr/lib/pkgconfig/vips.pc
 
+  var sharp = require("sharp");
+
+### crop(inputPath, outputPath, width, height, callback)
+
+Scale and crop JPEG `inputPath` to `width` x `height` and write JPEG to `outputPath` calling `callback` when complete.
+
+Example:
+
 ```javascript
-var sharp = require("sharp");
 sharp.crop("input.jpg", "output.jpg", 300, 200, function(err) {
@@ -48,4 +57,12 @@ if (err) {
   }
-  // output.jpg is cropped input.jpg
+  // output.jpg is a 300 pixels wide and 200 pixels high image
+  // containing a scaled and cropped version of input.jpg
 });
+```
+
+### embedWhite(inputPath, outputPath, width, height, callback)
+
+Scale and embed JPEG `inputPath` to `width` x `height` using a white canvas and write JPEG to `outputPath` calling `callback` when complete.
+
+```javascript
 sharp.embedWhite("input.jpg", "output.jpg", 200, 300, function(err) {
@@ -55,4 +72,12 @@ if (err) {
   }
-  // output.jpg contains input.jpg embedded with a white border
+  // output.jpg is a 300 pixels wide and 200 pixels high image
+  // containing a scaled version of input.jpg embedded on a white canvas
 });
+```
+
+### embedBlack(inputPath, outputPath, width, height, callback)
+
+Scale and embed JPEG `inputPath` to `width` x `height` using a black canvas and write JPEG to `outputPath` calling `callback` when complete.
+
+```javascript
 sharp.embedBlack("input.jpg", "output.jpg", 200, 300, function(err) {
@@ -62,3 +87,4 @@ if (err) {
   }
-  // output.jpg contains input.jpg embedded with a black border
+  // output.jpg is a 300 pixels wide and 200 pixels high image
+  // containing a scaled version of input.jpg embedded on a black canvas
 });
@@ -70,1 +96,8 @@ ```
 	npm test
+
+## Performance
+
+Using an AMD Athlon quad core CPU with 512KB L2 cache clocked at 3.3GHz with 8GB RAM:
+
+* imagemagick x 5.55 ops/sec �0.68% (31 runs sampled)
+* sharp x 24.49 ops/sec �6.85% (64 runs sampled)

tests/perf.js

 var sharp = require("../index");
 var imagemagick = require("imagemagick");
 var assert = require("assert");
+var Benchmark = require("benchmark");
 
-// http://www.flickr.com/photos/grizdave/2569067123/
-var input = __dirname + "/2569067123_aca715a2ee_o.jpg";
+var input = __dirname + "/2569067123_aca715a2ee_o.jpg"; // http://www.flickr.com/photos/grizdave/2569067123/
 var output = __dirname + "/output.jpg";
-
 var width = 640;
 var height = 480;
 
-// imagemagick
-var time = process.hrtime();
-imagemagick.resize({
-  srcPath: input,
-  dstPath: output,
-  quality: 0.75,
-  width: width,
-  height: height
-}, function(err) {
-  if (err) {
-    throw err;
+var suite = new Benchmark.Suite;
+suite.add("imagemagick", {
+  "defer": true,
+  "fn": function(deferred) {
+    imagemagick.resize({
+      srcPath: input,
+      dstPath: output,
+      quality: 0.75,
+      width: width,
+      height: height
+    }, function(err) {
+      if (err) {
+        throw err;
+      } else {
+        deferred.resolve();
+      }
+    });
   }
-  var diff = process.hrtime(time);
-  imagemagickTime = diff[0] * 1e9 + diff[1];
-  console.log("imagemagick took %d nanoseconds", imagemagickTime);
-
-  // sharp
-  time = process.hrtime();
-  sharp.crop(input, output, width, height, function(err) {
-    if (err) {
-      throw err;
-    }
-    diff = process.hrtime(time);
-	var sharpTime = diff[0] * 1e9 + diff[1];
-    console.log("sharp took %d nanoseconds", sharpTime);
-
-	// diff
-	assert(sharpTime < imagemagickTime, "sharp was blunt");
-	console.log("sharp was %d%% faster", (imagemagickTime - sharpTime) / imagemagickTime * 100);
-  });
-});
+}).add("sharp", {
+  "defer": true,
+  "fn": function(deferred) {
+    sharp.crop(input, output, width, height, function(err) {
+      if (err) {
+        throw err;
+      } else {
+        deferred.resolve();
+      }
+    });
+  }
+}).on("cycle", function(event) {
+  console.log(String(event.target));
+}).on("complete", function() {
+  assert(this.filter("fastest").pluck("name") == "sharp");
+}).run();

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Improved metrics

Total package byte prevSize

853266

increased by0.13%

Lines of code

52

increased by10.64%

Number of lines in readme file

97

increased by51.56%

Worsened metrics

Dev dependency count

2

increased by100%

No dependency changes