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# Off of the shaky grounds
the path towards stabilizing Substrate
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slide: https://hackmd.io/@gnunicorn/off-shaky-grounds#/
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### What we will cover
- Challenges
- Solutions
- Metering, Measuring & Profiling
- Freezes, `cargo unleash` & contionous releasing
- Benchmarking & Testing
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# Challenges
The problems we faced prior to releasing Substrate/Polkadot
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## Hard Performance
- 🕳️ leaking memory <!-- .element: class="fragment" data-fragment-index="1" -->
- 🥵 CPU spikes <!-- .element: class="fragment" data-fragment-index="2" -->
- 👋 dropping peers <!-- .element: class="fragment" data-fragment-index="3" -->
- 😱 stalling consensus <!-- .element: class="fragment" data-fragment-index="4" -->
- 💸 bad weights <!-- .element: class="fragment" data-fragment-index="5" -->
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## Process
- massive mono-repo with plenty of `path = ../` and circle-dev-dependencies, how even?
- a tale of two repos: polkadot and substrate being out of sync
- `master`-branch being broken because of merge-order
- `unittest` cover too little – all tests pass, yet the node is failing
- big refactors lead to instability for months
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# 🔧 fixing it
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# Hard Performance – leaks & spikes
measure, measure, measure!
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## MOAR Telemetry
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### Thank you! :sheep:
You can find me on
- GitHub
- Twitter
- or email me
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