The user wants a blog article in Spanish about optimizing performance in programming. It's a tutorial type. I need to write 900-1200 words, with a convincing introduction, 3-4 H2 sections with substantial content, and a conclusion with a call to action. Each H2 section must include a practical prompt with the syntax PROMPT: followed by the prompt ready to copy and paste. I need to research mentally (not generalize), give concrete steps, real tools, specific metrics. At least 2 practical examples. A section dedicated to common errors. Data updated to 2026, referencing current versions of ChatGPT, Claude, Gemini.

Style rules: professional but close tone, correct Spanish orthography (á, é, í, ó, ú, ñ, ¿, ¡). No markdown, no HTML in content, no internal thoughts. No self-references ("como hemos visto", "como mencioné antes"). Varied vocabulary. Avoid repeating words within 3 sentences. Prompts must have variables in [brackets] for personalization.

The output format should be:

[Section Title]

Section content in paragraphs.

Prompt
[prompt text]