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// The following data should be run in the console while viewing the page https://read.amazon.com/ | |
// It will export a CSV file called "download" which can (and should) be renamed with a .csv extension | |
var db = openDatabase('K4W', '3', 'thedatabase', 1024 * 1024); | |
getAmazonCsv = function() { | |
// Set header for CSV export line - change this if you change the fields used | |
var csvData = "ASIN,Title,Authors,PurchaseDate\n"; | |
db.transaction(function(tx) { |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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# Video: http://rubyhoedown2008.confreaks.com/08-chris-wanstrath-keynote.html | |
Hi everyone, I'm Chris Wanstrath. | |
When Jeremy asked me to come talk, I said yes. Hell yes. Immediately. But | |
then I took a few moments and thought, Wait, why? Why me? What am I supposed | |
to say that's interesting? Something about Ruby, perhaps. Maybe the | |
future of it. The future of something, at least. That sounds | |
keynote-y. | |