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64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
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# May 31th, 2016
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## Agenda
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1. Retrospective on last week:
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- What went well?
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- What was challenging?
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- What did you learn?
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## What went well?
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@robrix:
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- As of this morning we’re pushing data to graphite.
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- There's a 2 hour window of when data is pulled in to graphite.
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- We have a much more thorough understanding of the shape of the SES problems.
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@rewinfrey:
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- Came away with a much more thorough understanding of SES.
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- Pairing with Rob on the profiling issues.
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@joshvera
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- Exploring the current productions of tree-sitter output.
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- Got an airbnb for the Mini-Summit.
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## What was challenging?
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@robrix:
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- SES performance has been a problem. Briefly confused into thinking we had solved the problem. We’re profiling semantic-diff-tool and running the tests on semantic-diff. If we don’t clean semantic-diff-tool then it doesn’t know that semantic-diff has been rebuilt and it doesn’t try to relink it. Happens specifically when changing branches.
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- SES performance depends on O(n) cost function.
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@rewinfrey:
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- Heartbreaking to discover that a huge performance win was a bad build.
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- Felt like it was hard to contribute to the deployment and build process.
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- Do we have a fallback in place in case S3 fails?
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@joshvera:
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- Error productions from tree-sitter are difficult to debug and obscure diff summary output.
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- Understanding and communicating how our deployment process works to other people. Maybe this means we need better documentation?
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## What did you learn?
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@robrix:
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- Learning about parallelism because we have large asymptotic factors in SES.
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- Developed a stronger intuition for why cost has to be linear with respect to the size of the diff tree.
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@rewinfrey:
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- Learned a lot about profiling in Haskell.
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- Learned how to use Profiteur to visualize the space and time costs for a given computation.
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- Trying to use the Eval monad to parallelize the Minimax algorithm.
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@joshvera:
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- Learned about designing CRISPR proteins that can be edited into bacteria to defend against viruses and plasmids.
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- Read up on GHC's Core language in order to understand some of the optimizations GHC performs.
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## Other Items
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- Mini-Summit plans set for the week of June 20th.
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- Rob on vacation starting Tuesday June 7th! :sunglasses:
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