Jim Fulton

Experiment: compare ZODB file-storage iteration with Python and Rust

Contents

Introduction
Comparison
Working through data sharing
Non-nested iterator
Error handling
Error handling and iteration
Summary

Introduction

ZEO [1] storage servers, are slower than they should be. When benchmarking ZEO, storage servers are routinely CPU bound. The two biggest reasons for this appear to be:

the code runs slowly, and …

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Dealing with non-transactional things in transactional applications

This document started out as a proposal for mid-commit hooks on the ZODB mailing list, but I realized while writing it that mid-commit hooks were flawed. ZODB is a transactional object-oriented database. It uses a transaction package that provides a two-phase commit abstraction for Python.

Often, when working with transactions …

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