semble
★ 4.5k
vs
perfetto-mcp-rs
★ 15
semble vs perfetto-mcp-rs
semble: Semble is a high-performance code search library designed for AI agents, providing instant access to precise code snippets. It offers significantly faster indexing and querying compared to transformer models, achieving 99% of their retrieval quality while running entirely on CPU without external dependencies.; perfetto-mcp-rs: An MCP server that analyzes Perfetto traces via LLMs, using PerfettoSQL. It automatically downloads trace_processor_shell and provides tools for Chrome traces and generic queries. Works with agentic MCP clients like Claude Code.
01
TL;DR
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
Choose perfetto-mcp-rs if…Analyze scroll jank causes in Chrome traces
02
Side-by-Side Comparison
03
Features
semble01Fast performance on CPU (indexes in ~250ms, queries in ~1.5ms)
02High accuracy (NDCG@10 of 0.854), comparable to transformer models
03Supports indexing local paths and remote Git repositories
04Functions as an MCP server for various AI agents
05Zero setup, no API keys, GPU, or external services required
perfetto-mcp-rs01Automatic download of trace_processor_shell (no manual Perfetto install required)
02Supports multiple trace file formats (.pftrace, .perfetto-trace, .bin, etc.)
03Dedicated Chrome analysis tools (scroll jank, page load, main thread hotspots, etc.)
04One-line install script with automatic MCP server registration
05Cross-platform support (Linux, macOS, Windows)
04
Use Cases
semble↳Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
↳Searching local or remote codebases for specific code snippets based on natural language or code queries
↳Finding semantically similar code sections related to a given file path and line number
perfetto-mcp-rs↳Analyze scroll jank causes in Chrome traces
↳Evaluate page load performance metrics (FCP, LCP, etc.)
↳Execute custom PerfettoSQL queries on any trace file
05
Best For
sembleCode AssistantRAG / Knowledge Base
perfetto-mcp-rsTrendingObservabilityData Processing
FAQ
FAQ
What is the difference between semble and perfetto-mcp-rs?
Both semble and perfetto-mcp-rs are in the RAG / Knowledge Base category. semble has 4.5k stars, while perfetto-mcp-rs has 15 stars.
Which is better, semble or perfetto-mcp-rs?
The best choice depends on your use case. Choose semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities, and perfetto-mcp-rs if Analyze scroll jank causes in Chrome traces.
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
Is perfetto-mcp-rs free or open source?
Yes, perfetto-mcp-rs is open source on GitHub (Apache-2.0).
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