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V8 CPU Profiler Integration for v8go

1 post · Mar 2022

What this trail covers

Shopify has evolved its v8go library by integrating the V8 CPU Profiler, enabling Go developers to measure JavaScript performance. This involved exploring and implementing both lazy and eager loading strategies for profile data, with performance benchmarks guiding the final implementation to optimize Cgo call overhead for larger JavaScript execution trees.

All Shopify trails
  1. Adding the V8 CPU Profiler to v8go - ShopifyThis post details the integration of the V8 CPU Profiler into the v8go library. It explores two primary API implementation strategies: lazy loading, where each profile node property requires a separate Cgo call, and eager loading, where the entire profile graph is built in C++ and passed as a single pointer to Go. Performance benchmarks comparing these approaches for small and large JavaScript execution trees are presented, highlighting the trade-offs in Cgo call overhead.