0x
Flamegraph profiling for performance analysis.
Pricing
Free tier
Flat rate
Adoption
↘CoolingLicense
Open Source
Data freshness
Verified · Jul 12, 2026Overview
What is 0x?
0x is a tool that generates flamegraphs to help developers understand and optimize the performance of their applications. It provides detailed insights into where time is spent in code execution, making it easier to pinpoint bottlenecks.
Key differentiator
“The only flamegraph profiler specifically optimized for Rust applications, providing deep insights into performance without requiring cloud infrastructure.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Primarily designed for Rust applications, limiting its utility for developers working with other languages.
Requires manual configuration and integration steps that can be time-consuming and error-prone.
The tool may introduce noticeable performance degradation when active, which could skew profiling results in production-like environments.
Being an open-source project with a smaller user base means fewer contributors and less frequent updates compared to more popular tools.
Fit analysis
Who is it for?
✓ Best for
Rust teams needing detailed performance insights for optimization
Developers working on high-performance systems where execution time is critical
✕ Not a fit for
Projects not written in Rust, as the tool is specific to this language
Teams looking for a cloud-based profiling service (0x is local)
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Works well with
Integrations
Next step
Get Started with 0x
Step-by-step setup guide with code examples and common gotchas.