SEO and Core Web Vitals: Demystifying and Improving INP

Tue, 05 May 2026 12:00:00 +0900

INP (Interaction to Next Paint) measures a web page’s responsiveness to user interactions. This article demystifies Google’s Core Web Vitals metric, explores how it differs from the deprecated FID metric, and outlines how to optimize your JavaScript execution pathways to achieve “Good” scores.

1. What is Interaction to Next Paint (INP)?

INP tracks the latency of all user interactions (clicks, taps, and keyboard inputs) during a user’s visit to a page. It measures the duration between when a user initiates an action and when the browser paints the next frame showing the visual update.

PostgreSQL Performance Tuning for Web Developers

Mon, 20 Apr 2026 12:00:00 +0900

Optimize slow-performing applications by profiling database queries in PostgreSQL with EXPLAIN. Slow queries are the single largest bottleneck in most web applications. This guide walks you through essential index optimization guidelines, how to read execution plans, and key configuration parameter adjustments for self-hosted or managed databases.

1. Designing Effective Indexes

The primary bottleneck in modern databases is Disk I/O (reading block files from storage). Adding indexes allows PostgreSQL to query data records directly instead of scanning the entire table.

Performance on Kaisekukun

SEO and Core Web Vitals: Demystifying and Improving INP

1. What is Interaction to Next Paint (INP)?

PostgreSQL Performance Tuning for Web Developers

1. Designing Effective Indexes