Question 1

How does edwingeng/deque compare to Go's container/list for performance?

Accepted Answer

Deque is significantly faster, with benchmarks showing 12-55 ns/op for push/pop operations versus 158-159 ns/op for list.List. It also reduces allocations, especially in hardened mode where it achieves zero allocs/op.

Question 2

How to harden the element type in deque for better performance?

Accepted Answer

Run the hardening script (./harden.sh) with parameters for output directory, package name, and element type. This generates a type-specific version that eliminates interface allocations and improves speed.

Question 3

Is deque thread-safe for concurrent use in Go?

Accepted Answer

No, Deque does not provide built-in concurrency controls. You'll need to add external synchronization (e.g., using mutexes) if using it in multi-goroutine environments, which can negate some performance benefits.

Question 4

What are the best use cases for using deque over a slice in Go?

Accepted Answer

Deque excels when you need efficient additions and removals from both ends, like in job queues or sliding windows. Slices are better for random access, but Deque outperforms for end operations without costly reallocations.

Question 5

Does deque support random access to elements?

Accepted Answer

No, Deque is optimized for queue operations at the ends. The README doesn't mention methods for accessing middle elements, so for random access, you'd need to iterate or use a different data structure.

Question 6

How to install edwingeng/deque with Go modules?

Accepted Answer

Use 'go get -u github.com/edwingeng/deque' to fetch the library. For the generic version (v2), ensure you have Go 1.18+ and follow the version-specific instructions in the README.

deque

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