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Show HN: Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)
A terminal-first profiling workflow for macOS developers, eliminating the need to constantly switch to the Instruments GUI.
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A terminal-first profiling workflow for macOS developers, eliminating the need to constantly switch to the Instruments GUI.
Xtrace addresses a significant developer pain point for macOS engineers: the inefficiency of GUI-centric performance analysis tools. By providing a terminal-first interface to Instruments, it streamlines profiling workflows, enabling faster iteration and integration into automated pipelines. The JSON output for 'automation/LLM workflows' is a forward-looking feature, indicating a trend towards programmatic and AI-assisted performance optimization. This tool caters to a specific, high-value segment of developers who demand granular control and scriptability in their debugging processes. Its macOS-only nature and reliance on Instruments limit its broader market, but within its niche, it offers a compelling efficiency gain, potentially reducing development cycles and improving application performance.
I built this because I wanted a terminal-first profiling workflow on macOS, without constantly switching into the Instruments GUI.What it does today:- CPU analysis: summary, timeline, calltree, collapsed stacks, flamegraph, diff- GPU analysis (trace-gpu.py): active/idle ratios, command-buffer cadence, process ownership- Memory analysis (trace-memory.py): summary, leaks, growth, heap/regions- Recording modes: launch, attach by PID/name, wait-for spawn, system-wide- Root-aware attach flow for protected/root-owned processes- JSON output for automation/LLM workflows (I use it in autoresearch loops: hypothesis → experiment → keep/discard)Other notes:- macOS only (Instruments/xctrace)- core analysis is Python stdlib (no pip deps)- optional tools: speedscope + inferno for best visualizationWould love feedback on workflow, rough edges, and what integrations would make this more useful.
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Deep-Dive FAQs
What is Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)?
Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) is analyzed by our AI as: A terminal-first profiling workflow for macOS developers, eliminating the need to constantly switch to the Instruments GUI.. It focuses on Xtrace addresses a significant developer pain point for macOS engineers: the inefficiency of GUI-centric performance analysis tools. By providing a...
Where did Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) originate?
Data for Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) was aggregated directly from the Hacker News community ecosystem, representing raw developer and early-adopter sentiment.
When was Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) publicly launched?
The initial public indexing or launch date for Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) within our tracked developer communities was recorded on April 26, 2026.
How popular is Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)?
Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) has achieved measurable traction, logging over 2 traction score and facilitating 0 recorded discussions or engagements.
Which technical categories define Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)?
Based on metadata extraction, Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory) is categorized under topics such as: Unix-Style, macOS Profiling, Instruments, CPU analysis.
What are some commercial alternatives to Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)?
Our semantic intelligence engine identifies potential commercial alternatives in the SaaS space, such as Heard, which offers overlapping value propositions.
How does the creator describe Xtrace – Unix-Style macOS Profiling for Instruments (CPU/GPU/Memory)?
The original author or development team describes the product as follows: "I built this because I wanted a terminal-first profiling workflow on macOS, without constantly switching into the Instruments GUI.What it does today:- CPU analysis: summary, timeline, calltree, col..."
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