Difference between revisions of "Tawhiri/rewrite core"

Latest revision as of 21:21, 29 April 2021

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-== Idea: Rewriting the core of the predictor in Python ==
+#REDIRECT [[Tāwhirimātea#Idea: Rewriting the core of the predictor in Python]]
-Currently the predictor is split across 4 languages:
-* The homepage and AJAX requests are served by PHP
-* The client is mostly Javascript
-* PHP starts a python script, which downloads wind data and invokes:
-* The predictor itself, a C binary
-The majority of the time spent predicting is downloading wind data, so we don't really need C-performance. (Having said that, we may find we want it later when we come to do Monte Carlo ...).
-Benefits to moving to Python:
-* The majority of the C predictor is IO, getting wind data, reading scenarios, writing CSV. This would be far simpler in Python
-* Easier to add features, add different altitude models
-* Can have the predictor process get wind data directly, so we don't need latitude/longitude deltas - it just gets what it needs
-Although we intend to replace PyDAP, a Python rewrite could initially talk to PyDAP and use the existing PHP/Javascript. Indeed, it looks like it would be fairly simple to break work on the predictor up into independent stages, with rewriting the C being one.