performance-profiling

performance-profiling is a skill for Claude Code, Codex from HeshamFS/materials-simulation-skills. It costs 133 tokens per session (3,709 once invoked), scanned A, original, Apache-2.0.

A set of tools for finding slow parts of materials simulations, assessing parallel scaling, and estimating memory needs.

In plain words
What is it for?
It analyzes simulation timings, compares performance across processor counts, estimates memory from problem settings, and suggests optimization directions.
Why use it?
It turns timing logs and run data into information about bottlenecks and resource limits, which can otherwise be difficult to identify.

Skill for Claude CodeCodex

Part of the simulation-workflow plugin — 7 skills shipped together , and of reproducible-campaigns, full

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/heshamfs/materials-simulation-skills/performance-profiling
Any agent
npx skills add HeshamFS/materials-simulation-skills --skill performance-profiling
Clone the repo
git clone --depth 1 https://github.com/HeshamFS/materials-simulation-skills

Made for: Claude Code, Codex.

Or install simulation-workflow, the plugin that ships this one along with the rest of its 7 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for performance-profiling

README.md
[![agentmods](https://agentmods.dev/badge/skills/heshamfs/materials-simulation-skills/performance-profiling.svg)](https://agentmods.dev/skills/heshamfs/materials-simulation-skills/performance-profiling)
Your own site
<a href="https://agentmods.dev/skills/heshamfs/materials-simulation-skills/performance-profiling"><img src="https://agentmods.dev/badge/skills/heshamfs/materials-simulation-skills/performance-profiling.svg" alt="Measured on agentmods" height="20"></a>
Per session 133 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,709 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00133 $0.03709
Opus 5 $0.00067 $0.01854
Sonnet 5 $0.00027 $0.00742
Haiku 4.5 $0.00013 $0.00371

Measured 4d ago against content hash 9d7e4a35d3e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

performance-profiling scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/bottleneck_detector.py, scripts/memory_profiler.py, scripts/scaling_analyzer.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/simulation-workflow/performance-profiling/SKILL.md · 343 lines

How it starts

The opening of the file, as written. The whole thing — 343 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Performance Profiling

Goal

Provide tools to analyze simulation performance, identify bottlenecks, and recommend optimization strategies for computational materials science simulations.

Requirements

  • Python 3.10+
  • No external dependencies (uses Python standard library only)
  • Works on Linux, macOS, and Windows

Inputs to Gather

Before running profiling scripts, collect from the user:

Input Description Example
Simulation log Log file with timing information simulation.log
Scaling data JSON with multi-run performance data scaling_data.json
Simulation parameters JSON with mesh, fields, solver config params.json
Available memory System memory in GB (optional) 16.0

Decision Guidance

When to Use Each Script

Need to identify slow phases?
├── YES → Use timing_analyzer.py
│         └── Parse simulation logs for timing data
│
Need to understand parallel performance?
├── YES → Use scaling_analyzer.py
│         └── Analyze strong or weak scaling efficiency
│
Need to estimate memory requirements?
├── YES → Use memory_profiler.py
│         └── Estimate memory from problem parameters
│
Need optimization recommendations?
└── YES → Use bottleneck_detector.py
          └── Combine analyses and get actionable advice

Choosing Analysis Thresholds

Metric Good Acceptable Poor
Phase dominance <30% 30-50% >50%
Parallel efficiency >0.80 0.70-0.80 <0.70
Memory usage <60% 60-80% >80%

Script Outputs (JSON Fields)

All scripts wrap their payload in a top-level object with two keys: inputs and results. The fields below live under results.

Script Key Outputs (under results)
timing_analyzer.py results.phases, results.slowest_phase, results.total_time
scaling_analyzer.py results.results, results.efficiency_threshold_processors, results.average_efficiency, results.baseline
memory_profiler.py results.total_memory_gb, results.per_process_gb, results.field_memory_gb, results.solver_workspace_gb, results.matrix_storage_gb, results.warnings
bottleneck_detector.py results.bottlenecks, results.recommendations

Read the full file on GitHub · 343 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 343 lines · 133 tokens per session scan A 9d7e4a35d3e2

Subscribe to this mod's changes

performance-profiling is a skill published in the GitHub repository HeshamFS/materials-simulation-skills (65 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 133 tokens to every session and 3,709 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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