gemini-code-assist[bot] commented on PR #341: URL: https://github.com/apache/tvm-ffi/pull/341#issuecomment-3648092848
## Summary of Changes Hello @junrushao, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request addresses a performance bottleneck in `Map.get` by fundamentally changing how missing keys are handled. Instead of relying on Python's exception handling mechanism, which can incur overhead, the system now employs a dedicated 'missing object' returned directly from the C++ FFI layer. This approach streamlines key lookup operations, particularly in scenarios where keys are frequently absent, leading to more efficient execution. ### Highlights * **Introduction of a 'MISSING' Sentinel Object**: A special `MISSING` object is introduced to represent the absence of a key in `Map` operations, avoiding the need for exceptions. * **New FFI APIs for Map Lookups**: Two new FFI functions, `MapGetItemOrMissing` and `MapGetMissingObject`, are added to the `_ffi_api` to facilitate efficient key lookups that return the `MISSING` object instead of raising a `KeyError`. * **Refactored Python Map Methods**: The `Map.get` method and `Map.__contains__` are updated in Python to utilize the new FFI APIs and the `MISSING` object, replacing `try-except KeyError` blocks with direct checks for the sentinel object, which can improve performance. * **C++ Backend Changes**: The C++ implementation now includes `GetMissingObject` and `ffi.MapGetItemOrMissing`, where the latter returns the `MISSING` object upon a key not found, preventing exceptions from being thrown across the FFI boundary. <details> <summary><b>Using Gemini Code Assist</b></summary> <br> The full guide for Gemini Code Assist can be found on our [documentation page](https://developers.google.com/gemini-code-assist/docs/review-github-code), here are some quick tips. <b>Invoking Gemini</b> You can request assistance from Gemini at any point by creating a comment using either `/gemini <command>` or `@gemini-code-assist <command>`. Below is a summary of the supported commands on the current page. Feature | Command | Description --- | --- | --- Code Review | `/gemini review` | Performs a code review for the current pull request in its current state. Pull Request Summary | `/gemini summary` | Provides a summary of the current pull request in its current state. Comment | @gemini-code-assist | Responds in comments when explicitly tagged, both in pull request comments and review comments. Help | `/gemini help` | Displays a list of available commands. <b>Customization</b> To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a `.gemini/` folder in the base of the repository. Detailed instructions can be found [here](https://developers.google.com/gemini-code-assist/docs/customize-gemini-behavior-github). <b>Limitations & Feedback</b> Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with :thumbsup: and :thumbsdown: on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up [here](https://google.qualtrics.com/jfe/form/SV_2cyuGuTWsEw84yG). <b>You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the [Gemini Code Assist IDE Extension](https://cloud.google.com/products/gemini/code-assist).</b> </details> [^1]: Review the [Privacy Notices](https://policies.google.com/privacy), [Generative AI Prohibited Use Policy](https://policies.google.com/terms/generative-ai/use-policy), [Terms of Service](https://policies.google.com/terms), and learn how to configure Gemini Code Assist in GitHub [here](https://developers.google.com/gemini-code-assist/docs/customize-gemini-behavior-github). Gemini can make mistakes, so double check it and [use code with caution](https://support.google.com/legal/answer/13505487). -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
