~/talk

What can you learn from thousands of source files in Github?

Talkat Devoxx US 2017 · 2017-03-21..03-23· [data-engineering]
slides:none on file

Uses GitHub’s BigQuery dataset (3 TB, ~2.8M repos, 145M commits, 163M latest-file revisions) and SQL queries with regex-extract and quantiles to analyze Groovy/Gradle source. Finds under a million .groovy files totaling ~16M lines, 50% of files ≤37 lines and 90th percentile <148 lines, surprising frequent script names like A.groovy/B.groovy, common transforms led by @CompileStatic. Compares build systems (≈1M Maven vs ~500k Gradle files) and shows H2, MySQL, PostgreSQL as top DB drivers.

AI-written summary · about

  1. 0:00Introduction
  2. 7:43Google BigQuery
  3. 10:25How many Groovy files are there
  4. 12:04Most frequent Groovy file names
  5. 13:35Groovy scripts
  6. 15:05Saved queries
  7. 17:05Histogram
  8. 18:10Transformations
  9. 20:14Other interesting functions
  10. 22:17Maven vs Gradle
  11. 23:45Dependencies
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