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We are used to thinking that “high-load” means distributed systems, computing power, application, and kernel profiling. But sometimes you can’t simply scale your cluster. Maybe your hashmaps don’t fit in the server memory. Maybe you need single-digit millisecond latency. Maybe the cost is too high. Or your server is a … mobile phone.
In this talk, we will show how popular and lesser-known algorithms, data structures, and systems tuning helped us to overcome these blockers. Who said you don’t need to know algorithms nowadays?