Viewing profile — tyler

95% of requests. But yeah! And thank you. :)

TTFB at the 50th hovers around 175 microseconds, 75th is at 250 microseconds, 95th around 450 microseconds. As for the purging stuff, I do mean cross-region. So, it depends upon wh…

We like to think that the exact number of requests is less important than exactly how they're handled. While it would be cool to go "we serve a billion requests a second", we're st…

I'm sorry that my statement is bothering you. I'm going based on numerous conversations with people considering using Fastly. It's quite possible that I have a skewed sample, howev…

Alright. Let's go point-by-point. The primary feature advertised on fastly's website is a feature every real CDN (as in, "not CloudFront") offers: an API to immediately purge your …

Actually, tests from us and several of our customers have shown us significantly faster than Edgecast throughout the US and Europe. (I work at Fastly.)

If that's what you're after you might want to check out Fastly. We're a CDN entirely based on Varnish, with all the features that implies.

Fastly (fastly.com) is designed for exactly this purpose.

Cmd + `

No. Memcached on a reasonable server will do millions of requests per second. 50,000 updates per second is nothing for any modern cache. Also, replication has nothing to do with wh…

"with no cache" is a bit of a misleading statement, considering the entirety of their data set is stored in RAM. Turns out you don't really need memcached if you don't read anythin…

I had a little project a while ago that compiled Mustache templates into C. Never was completely done, but it mostly works: https://github.com/tyler/speed_stache

Greplin has to do huge scale information retrieval. This probably counts as engineering. (See: SIGIR)

I don't mean to be pedantic, but the word "transparent", in this context, means "easily perceived or detected". I believe you're using it to mean the opposite.

So, what the "thread-safe mode" does is enable threads in Rails. (i.e. one thread per request.) To my knowledge, it does not switch out thread-unsafe code for thread-safe code. Mor…

"Since Rails is not threadsafe, typically several processes will run in parallel on a machine, behind a threaded Web server such as Apache or nginx." This is incorrect. Rails 3 (an…

It sounds like you're conflating two techniques here. The first (as others have mentioned) is cosine similarity, which measures the angle between the vectors. However, the bit abou…

Two useful implementations that this article misses are Array-compacted tries (aka dual-array tries) and Array-mapped tries. ACTs are nice due to the small memory footprint and goo…

The actual blog post: http://conversations.nokia.com/2010/06/28/how-do-you-hold-yo...

I think that rather than a simple "I will ignore X", his point was more "I will ignore X because experimental evidence indicates X is not true". This seems completely legitimate to…

This article is poorly written and flat out wrong. His second example simply shows a public post of his on a public group. His statement "Facebook makes public EVERYTHING about its…