pitrou opened a new pull request #11828: URL: https://github.com/apache/arrow/pull/11828
Some CSV files may have long cells (values), for example if containing arbitrary texts or even things like timestamps. We can speed up parsing such CSV files by filtering multiple bytes at once for state-changing characters such as delimiters. This PR adds two kinds of bulk filters: - a very simple heuristic Bloom filter - a precise filter using SSE4.2 packed compare Given that negative filter matches have a non-trivial cost, the bulk filters are enabled only if the average cell length exceeds a given threshold. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
