Why Rust?

Qdrant chose Rust after its founder moved beyond an initial C++ prototype and found Java, Scala, and Python less suitable for a high-performance, low-memory production system because of concerns including garbage collection, latency variability, runtime overhead, limited memory control, or slower execution. Rust was selected over Go for its systems-level performance, memory safety, explicit control of stack and heap allocation, prevention of common C++ errors, and safeguards against data races, which Qdrant says support robust cloud services and easier parallelization. The post acknowledges trade-offs such as C++-like compile times and a steeper learning curve than Python or Go, but argues that Rust’s strict type system prevents defects early and improves development speed over time. It also cites a mature web-service ecosystem, a relatively compact Docker image—about 74 MB compressed as checked in October 2026—and growing adoption by major technology companies and machine-learning organizations as evidence supporting the decision.

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