Improve ConvertToBytes performance#127
Conversation
WalkthroughThe Changes
Sequence Diagram(s)sequenceDiagram
participant Caller
participant ConvertToBytes
Caller->>ConvertToBytes: Call with human-readable size string
ConvertToBytes->>ConvertToBytes: Find last numeric character, identify unit
alt String contains decimal
ConvertToBytes->>ConvertToBytes: Parse number as float
else
ConvertToBytes->>ConvertToBytes: Parse number as uint
end
ConvertToBytes->>ConvertToBytes: Switch on unit character for multiplier
ConvertToBytes-->>Caller: Return computed byte value
Possibly related PRs
Suggested reviewers
Poem
📜 Recent review detailsConfiguration used: CodeRabbit UI 📒 Files selected for processing (1)
🧰 Additional context used🧠 Learnings (2)📓 Common learningscommon_test.go (13)🧬 Code Graph Analysis (1)common_test.go (1)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)
🔇 Additional comments (1)
✨ Finishing Touches
🧪 Generate unit tests
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. 🪧 TipsChatThere are 3 ways to chat with CodeRabbit:
SupportNeed help? Create a ticket on our support page for assistance with any issues or questions. Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments. CodeRabbit Commands (Invoked using PR comments)
Other keywords and placeholders
CodeRabbit Configuration File (
|
There was a problem hiding this comment.
Summary of Changes
Hello @ReneWerner87, I'm Gemini Code Assist1! 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 focuses on enhancing the performance of the ConvertToBytes utility function. The primary goal is to optimize how numeric values are parsed from input strings and to streamline the lookup process for unit multipliers, leading to more efficient byte conversion.
Highlights
- Performance Optimization: The
ConvertToBytesfunction has been optimized for better performance, particularly in its numeric parsing and unit multiplier handling. - Numeric Parsing Improvement: The numeric part of the input string is now parsed more efficiently. It uses
strconv.ParseUintfor integer values and falls back tostrconv.ParseFloatonly when a decimal point is detected, avoiding unnecessary floating-point parsing. - Unit Multiplier Lookup Refactor: The mechanism for applying unit multipliers (e.g., 'k' for kilo, 'm' for mega) has been refactored from a map-like lookup to a direct
switchstatement, which typically offers better performance for a fixed set of cases.
Using Gemini Code Assist
The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.
Invoking Gemini
You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.
| 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 issue comments and review comments. |
| Help | /gemini help |
Displays a list of available commands. |
Customization
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.
Limitations & Feedback
Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.
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.
Footnotes
-
Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #127 +/- ##
==========================================
+ Coverage 95.88% 96.00% +0.11%
==========================================
Files 9 9
Lines 510 525 +15
==========================================
+ Hits 489 504 +15
Misses 14 14
Partials 7 7
Flags with carried forward coverage won't be shown. Click here to find out more. ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
|
There was a problem hiding this comment.
Code Review
The pull request improves the performance of the ConvertToBytes function by optimizing numeric parsing and replacing the map lookup with a switch statement for unit multipliers. I've identified a potential issue where the unit prefix position might be set incorrectly if the input string contains non-numeric characters before the unit, and that the switch statement should also handle uppercase prefixes.
|
old: new: |
There was a problem hiding this comment.
Actionable comments posted: 1
♻️ Duplicate comments (1)
common.go (1)
129-131: Unit prefix detection logic has a known issue.The condition
c != ' 'will be true for any non-space character, including letters. This means that if the input string contains a mix of numbers and letters before the unit prefix,unitPrefixPosmight be set incorrectly. For example, in the string "123a k",unitPrefixPoswill be set to the index of 'a' instead of 'k'.Apply this fix to only detect alphabetic characters as unit prefixes:
- if c != ' ' { + if c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' { unitPrefixPos = i }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
common.go(3 hunks)
🧰 Additional context used
🧠 Learnings (1)
common.go (5)
Learnt from: norri
PR: gofiber/recipes#2701
File: clean-code/app/server/handlers/books.go:28-43
Timestamp: 2024-11-23T19:54:01.389Z
Learning: In 'clean-code/app/server/handlers/books.go', validation is out of scope and should not be suggested.
Learnt from: juls0730
PR: gofiber/recipes#2710
File: tableflip/main.go:61-62
Timestamp: 2024-12-01T01:15:48.126Z
Learning: In the GoFiber `tableflip` recipe (`tableflip/main.go`), the implementation matches the upstream reference implementation. Future code suggestions should consider maintaining this alignment to ensure consistency.
Learnt from: efectn
PR: gofiber/fiber#3162
File: hooks_test.go:228-228
Timestamp: 2024-12-13T08:14:22.851Z
Learning: In Go test files, prefer using the `require` methods from the `testify` package for assertions instead of manual comparisons and calls to `t.Fatal` or `t.Fatalf`.
Learnt from: sixcolors
PR: gofiber/fiber#2922
File: middleware/cors/utils.go:63-71
Timestamp: 2024-07-26T21:00:12.902Z
Learning: The project uses the testify/assert package for assertions in unit tests.
Learnt from: sixcolors
PR: gofiber/fiber#2922
File: middleware/cors/utils.go:63-71
Timestamp: 2024-10-08T19:06:06.583Z
Learning: The project uses the testify/assert package for assertions in unit tests.
🪛 GitHub Check: Build (1.24.x, ubuntu-latest)
common.go
[failure] 145-145:
constant -1 overflows uint64
🪛 GitHub Check: Compare
common.go
[failure] 145-145:
constant -1 overflows uint64
🪛 GitHub Actions: Benchmark
common.go
[error] 145-145: Go compiler error: constant -1 overflows uint64
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)
- GitHub Check: Analyse
- GitHub Check: Build (1.23.x, macos-13)
- GitHub Check: lint
🔇 Additional comments (4)
common.go (4)
16-16: LGTM: Import addition is necessary for the new logic.The addition of the "strings" package import is required for the
strings.IndexBytefunction used in the conditional parsing logic.
33-35: LGTM: Variable renames are unrelated to the main changes.These UUID-related variable renames don't affect the
ConvertToBytesfunction optimization.
137-149: Excellent optimization: Conditional parsing improves performance.The conditional parsing logic that uses
strconv.ParseUintfor integers andstrconv.ParseFloatfor decimal values is a smart optimization that avoids unnecessary float parsing overhead for integer inputs.
152-163: LGTM: Switch statement optimization with proper case handling.The switch statement replacement provides better performance than array lookup. The use of
toLowerTablecorrectly handles both uppercase and lowercase unit prefixes, addressing the previous concern about case sensitivity.
|
old: new: |
Summary
ConvertToBytesTesting
go vet ./...go test ./...go test -bench=Benchmark_ConvertToBytes -benchmem -run=^$ ./...https://chatgpt.com/codex/tasks/task_e_686e194510148326b750eb06787f7f5e
Summary by CodeRabbit
Bug Fixes
Refactor