Next I tried Bubblemark<\/a>. I maxed it out at 128 bubbles. On Vista with Silverlight 3 I got about 240 fps; on the same machine with Silverlight 4 about 260fps; about 8%.<\/p>\n Next I tried on an Apple Mac. My Mac Mini is less powerful, though not that bad, an Intel 1.83 Ghz Core Duo. On the Prime test I got 0.54 secs before, and 0.50 secs after the upgrade to 4.0, about 7.5% improvement. On Bubblemark, it was only 24 fps before and after.<\/p>\n I guess the vast difference in graphics performance is also interesting. It is not just Mac vs Windows; the Nvidia GeForce 6800 on the PC is more powerful than whatever is in the Mac Mini.<\/p>\n If anyone can tell me in what respect version 4.0 is twice as fast, I’d be grateful.<\/p>\n Update<\/strong>: prompted by the comment from David Heffernan below, I also tried the Encog Silverlight Benchmark<\/a>. I used an older core duo laptop, since I am running out of machines to upgrade. I ran the test\u00a0twice before upgrading, and twice after. Lower is better:<\/p>\n Silverlight\u00a03.0: 22.0<\/p>\n Silverlight 4.0: 12.7<\/p>\n That\u2019s about 42% better, where \u201ctwice as fast\u201d would be 50% better, much closer to Guthrie\u2019s claim. I guess it depends what you measure.<\/p>\n","protected":false},"excerpt":{"rendered":" Microsoft\u2019s Scott Guthrie spoke of \u201ctwice as fast performance\u201d in the newly-released Silverlight 4, thanks to a new just-in-time compiler. Performance is a hard thing to nail down. Maybe he meant that compilation is twice as fast? I\u2019m not sure; but I tried a couple of quick tests. First, I looked at my Primes test. … Continue reading Silverlight 4 vs Silverlight 3: a little bit faster?<\/span> ![\"image\"](\"http:\/\/www.itwriting.com\/blog\/wp-content\/uploads\/2010\/04\/image_thumb9.png\" "\\"image\\"")
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