Web性能研究社区近日发布2026年Web性能预算与设备网络环境分析报告，指出中低端Android设备与慢速网络仍占主流，而网站体积和JavaScript负载的持续膨胀正加剧全球性能不平等1。为反映现状，报告将2026年网络测试参数更新为9 Mbps下行、3 Mbps上行，P75网络延迟从约110毫秒降至约100毫秒，并推荐Samsung Galaxy A24 4G（或等效设备）与HP 14笔记本作为标准测试机型1。
数据表明，中位移动页面大小已达2.6 MiB，超过了DOOM游戏2.48 MiB的体积1。移动端JavaScript负载自2015年以来翻倍，P50达680 KiB，P75达1.3 MiB1。受此影响，不到一半的站点在移动用户上通过Core Web Vitals评分，超过40%的站点在桌面用户上表现仍然较差1。硬件方面，低端Android设备CPU性能自2022年以来未有实质性提升，而iPhone 17 Pro的L1+L2+L3缓存约50 MiB（每核8.3 MiB），凸显了设备间的巨大差异1。市场数据显示，全球智能手机平均售价约370美元，低端设备已降至100美元以下，且翻新iPhone年销售额超过400亿美元1。此外，桌面设备中80%为笔记本、平板等电池供电设备，而SPA站点平均每次完整页面加载仅对应1次软导航1。
A newly released analysis on the 2026 web performance budget highlights a growing performance inequality gap driven by bloated website sizes and JavaScript payloads against the backdrop of prevalent low-end Android devices and slow networks 1. To reflect current realities, the report updates its testing parameters to a 9 Mbps download, 3 Mbps upload, and 100 ms round-trip time network, while recommending the Samsung Galaxy A24 4G or an equivalent device alongside an HP 14 laptop for testing 1.
The data reveals significant bloat in modern web development, with the median mobile page size reaching 2.6 MiB, which exceeds the size of the classic DOOM game at 2.48 MiB 1. Furthermore, the mobile JavaScript payload has doubled since 2015, hitting a median of 680 KiB and a 75th percentile of 1.3 MiB 1. Consequently, less than half of all websites pass the Core Web Vitals assessment for mobile users, and over 40% still perform poorly on desktop 1. Additionally, single-page application sites average only one soft navigation per full page load 1.
The hardware and network landscape further exacerbates these issues, as the CPU performance of low-end Android devices has seen no substantial improvement since 2022 1. While high-end devices like the iPhone 17 Pro boast approximately 50 MiB of combined L1, L2, and L3 cache at 8.3 MiB per core, the global average smartphone selling price remains around $370, with low-end models dropping below $100 1. The refurbished iPhone market alone generates over $40 billion in annual sales, and 80% of desktop devices are battery-powered laptops and tablets 1. On the network front, the 75th percentile network latency has slightly decreased from approximately 110 ms to about 100 ms 1. To improve the global user experience, the report urges developers to control resource sizes and calls on browsers and search engines to provide stronger guidance 1.
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