Ylang

OpenResty XRay Apr 7, 2025

OpenResty XRay Updated Apr 7, 2025 5 mins read

OpenResty XRay Helps Boost Script Performance by 44 Times

From Bottleneck Discovery to Significant Speed Improvement
How OpenResty XRay Works
Comparison with Traditional Methods

From Bottleneck Discovery to Significant Speed Improvement
How OpenResty XRay Works
Comparison with Traditional Methods

OpenResty XRay Apr 3, 2025

OpenResty XRay Updated Apr 3, 2025 4 mins read

Case Study: OpenResty XRay Doubles Ylang Compiler Performance

Case Study: OpenResty XRay Doubles Ylang Compiler Performance
Significant Optimization Results
Ylang Language: The Ideal Tool for Dynamic Tracing
A Model of Technical Synergy
Further Reading

Case Study: OpenResty XRay Doubles Ylang Compiler Performance
Significant Optimization Results
Ylang Language: The Ideal Tool for Dynamic Tracing
A Model of Technical Synergy
Further Reading

OpenResty XRay Jan 14, 2024

OpenResty XRay Updated Jan 14, 2024 4 mins read

Dynamic-Tracing Custom Go Programs with Custom Ylang Analyzers (using OpenResty XRay)

Insert two key-value Pairs into a Go Variable
Write a Customize Ylang Analyzer to Dynamically Trace the Go program
Test the Results
What is OpenResty XRay

Insert two key-value Pairs into a Go Variable
Write a Customize Ylang Analyzer to Dynamically Trace the Go program
Test the Results
What is OpenResty XRay

OpenResty XRay Sep 20, 2023

OpenResty XRay Updated Sep 20, 2023 14 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 4 of 4)

Transparent Container Tracing
Efficient Stack Unwinding
Analyzing Dead Processes (Core Dumps)
Very Low Tracing Overhead
Standard Ylang Libraries & Tools
Network Filtering & Control
The Ylang Compiler’s Implementation
Operating System Support
Contributions to Open-Source Communities

Photo by Yichun Zhang

Transparent Container Tracing
Efficient Stack Unwinding
Analyzing Dead Processes (Core Dumps)
Very Low Tracing Overhead
Standard Ylang Libraries & Tools
Network Filtering & Control
The Ylang Compiler’s Implementation
Operating System Support
Contributions to Open-Source Communities

OpenResty XRay Jul 10, 2023

OpenResty XRay Updated Jul 10, 2023 10 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 3 of 4)

The Language Syntax (Continued)
- String Literals
- Built-in Regex Support
- Full Control-Flow Support
- Floating-Point Number Support
- Compared to Open-Source Toolchains
Transparent Debug Symbol Handling
- Debug Symbols: No Runtime Overhead
- Centralized Package Database
- Fuzzy Matching Debug Symbols

Photo by Yichun Zhang

The Language Syntax (Continued)
- String Literals
- Built-in Regex Support
- Full Control-Flow Support
- Floating-Point Number Support
- Compared to Open-Source Toolchains
Transparent Debug Symbol Handling
- Debug Symbols: No Runtime Overhead
- Centralized Package Database
- Fuzzy Matching Debug Symbols

OpenResty XRay Aug 21, 2023

OpenResty XRay Updated Aug 21, 2023 14 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 2 of 4)

The Language Syntax (Continued)
- Macros with Extensions
- Tracer and Tracee Spaces
- Probes
- Extended Variable Types

Photo by Yichun Zhang

The Language Syntax (Continued)
- Macros with Extensions
- Tracer and Tracee Spaces
- Probes
- Extended Variable Types

OpenResty XRay Jul 10, 2023

OpenResty XRay Updated Jul 10, 2023 14 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)

What is Dynamic Tracing
Why the “Y” Name
Getting Started
Various Backends and Runtimes
Why a Unified Frontend Language
The Language Syntax

Photo by Yichun Zhang

What is Dynamic Tracing
Why the “Y” Name
Getting Started
Various Backends and Runtimes
Why a Unified Frontend Language
The Language Syntax

OpenResty XRay Jan 14, 2023

OpenResty XRay Jan 14, 2023

Automatic Analysis Reports in OpenResty XRay

Photo by Yichun Zhang

The Past
The Present
The Future

OpenResty XRay Nov 12, 2021

OpenResty XRay Nov 12, 2021

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)

Photo by Yichun Zhang

What is Dynamic Tracing
Why the “Y” Name
Getting Started
Various Backends and Runtimes
Why a Unified Frontend Language
The Language Syntax

OpenResty XRay Aug 31, 2020

OpenResty XRay Aug 31, 2020

Introduction to Lua-Land CPU Flame Graphs

Photo by Guido Jansen

What is a Flame Graph
Simple Lua samples
Complicated Lua applications
Sampling overhead
Safety
Compatibility
Other types of Lua-land Flame Graphs

OpenResty XRay Aug 10, 2020

OpenResty XRay Aug 10, 2020

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

Photo by Elena Mozhvilo

An empty zone
Filling entries of similar sizes
Deleting odd-numbered keys
Deleting the keys in the first half
Mitigating Fragmentation

OpenResty XRay Aug 4, 2020

OpenResty XRay Aug 4, 2020

How OpenResty and Nginx Shared Memory Zones Consume RAM

Photo by Jose G. Ortega Castro

Slabs and pages
What is allocated is not what is paid for
Fake Memory Leaks
HUP reload

OpenResty XRay Jan 21, 2020

OpenResty XRay Jan 21, 2020

How OpenResty and Nginx Allocate and Manage Memory

Photo by Harrison Broadbent

On The System Level
On The Application Level
For Traditional Nginx Servers

OpenResty XRay May 7, 2025

OpenResty XRay May 7, 2025

From Black Box to White Box: OpenResty XRay Makes System Issues Nowhere to Hide

From Black Box to White Box: OpenResty XRay Makes System Issues Nowhere to Hide

A Dynamic Tracing Tool That Turns Black Boxes into White Boxes
Comprehensive Multi-dimensional Analysis Capabilities
Real-World Case Studies
Product Vision

OpenResty XRay Apr 18, 2025

OpenResty XRay Apr 18, 2025

OpenResty XRay Empowers LLVM clang Performance Optimization Practices

OpenResty XRay Empowers LLVM clang Performance Optimization Practices

What is LLVM/clang
OpenResty XRay Analysis Process
Optimization Implementation and Results
Conclusion

OpenResty XRay Apr 17, 2025

OpenResty XRay Apr 17, 2025

Self-Optimization: The Performance Evolution of OpenResty XRay

Self-Optimization: The Performance Evolution of OpenResty XRay

Challenges and Pain Points
OpenResty XRay’s Self-Analysis Process
Remarkable Optimization Results
Technical Insights and Business Value
Conclusion

OpenResty XRay Apr 7, 2025

OpenResty XRay Apr 7, 2025

OpenResty XRay Helps Boost Script Performance by 44 Times

OpenResty XRay Helps Boost Script Performance by 44 Times

From Bottleneck Discovery to Significant Speed Improvement
How OpenResty XRay Works
Comparison with Traditional Methods

OpenResty XRay Apr 3, 2025

OpenResty XRay Apr 3, 2025

Cross-Media Data Structure Drift: OpenResty XRay Enables 20x Performance Improvement

Cross-Media Data Structure Drift: OpenResty XRay Enables 20x Performance Improvement

Performance Challenges and Breakthroughs
Practical Significance of 20x Performance Improvement
Future Outlook

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