The resume states that you increased processing speed by 4-5 times at your previous job — can you tell me more about that?

To accelerate data processing by 4–5 times, I conducted a comprehensive analysis of bottlenecks in the system. The main steps:

• Optimized processing algorithms by replacing inefficient loops and operations with faster data structures.
• Rewrote critical sections of code at a lower level, using profiling to identify hot spots.
• Implemented parallel processing using goroutines and channels in Go, which allowed for effective utilization of multithreading.
• Optimized database interactions by reducing the number of queries and implementing caching.

Example of parallel processing in Go:

func processItems(items []Item) {
    var wg sync.WaitGroup
    for _, item := range items {
        wg.Add(1)
        go func(it Item) {
            defer wg.Done()
            // process item
        }(item)
    }
    wg.Wait()
}

These measures collectively significantly increased data processing speed.