--- title: C++: Write, shorten, optimize | daily.dev description: A hands-on C++ refactoring walkthrough using a real function from the AI-generated VibeTensor project. The original code computes tensor strides and element... canonical: https://daily.dev/posts/c-write-shorten-optimize-edp5wvbfi twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: C++: Write, shorten, optimize | daily.dev og:description: A hands-on C++ refactoring walkthrough using a real function from the AI-generated VibeTensor project. The original code computes tensor strides and element... og:url: https://daily.dev/posts/c-write-shorten-optimize-edp5wvbfi og:image: https://api.daily.dev/og/posts/EDP5wvbfi.png og:image:alt: C++: Write, shorten, optimize og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # C++: Write, shorten, optimize **[Medium](https://daily.dev/sources/medium_js)** · 14 min read · 0 upvotes · 0 comments ## Summary A hands-on C++ refactoring walkthrough using a real function from the AI-generated VibeTensor project. The original code computes tensor strides and element count using two separate loops with redundant flags and excessive static_cast noise. Step by step, the author eliminates the any_zero flag, merges the two loops into one, removes unnecessary casts, and drops the zero-initialization of the strides vector — cutting the code from 20 lines to 9. Assembly output from Clang -O2 is compared before and after, showing the refactored version produces a single tight loop with no conditional branch (using the carry flag trick instead). Benchmarks show roughly 10% performance improvement. A Claude-suggested alternative using a boolean flag and half the multiplications is also analyzed and benchmarked, performing similarly. The piece closes with a broader argument that human expertise in code quality remains essential even in the AI coding era. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Tensor is the might](https://daily.dev/posts/tensor-is-the-might-v87pxfcye) · Hacker News · 0 upvotes · 0 comments - [Medium](https://daily.dev/posts/medium-ojmvowxhc) · Medium · 0 upvotes · 0 comments - [Let's check vibe code that acts like optimized C\+\+ one but is actually a mess](https://daily.dev/posts/let-s-check-vibe-code-that-acts-like-optimized-c-one-but-is-actually-a-mess-bbenrvqi7) · C\+\+ · 0 upvotes · 0 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#ai-coding](https://daily.dev/tags/ai-coding), [#c++](https://daily.dev/tags/c++), [#assembly](https://daily.dev/tags/assembly) [View this post on daily.dev](https://daily.dev/posts/c-write-shorten-optimize-edp5wvbfi) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"C++: Write, shorten, optimize","url":"https://daily.dev/posts/c-write-shorten-optimize-edp5wvbfi","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/c-write-shorten-optimize-edp5wvbfi"},"datePublished":"2026-07-26T19:48:11.343Z","dateModified":"2026-07-26T19:48:57.173Z","description":"A hands-on C++ refactoring walkthrough using a real function from the AI-generated VibeTensor project. 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