{"id":73626,"date":"2025-08-11T11:43:02","date_gmt":"2025-08-11T06:13:02","guid":{"rendered":"https:\/\/www.tothenew.com\/blog\/?p=73626"},"modified":"2025-09-23T10:50:11","modified_gmt":"2025-09-23T05:20:11","slug":"android-memory-evolution","status":"publish","type":"post","link":"https:\/\/www.tothenew.com\/blog\/android-memory-evolution\/","title":{"rendered":"Android\u2019s Memory Evolution: From 4 KB Pages to 16 KB Pages"},"content":{"rendered":"<h2>Introduction<\/h2>\n<p>Google is making a quiet but powerful change under the hood of Android: the default memory page size is shifting from 4 KB to 16 KB. At first glance, this may sound like a minor technical adjustment\u2014but in practice, it has wide-reaching effects on performance, battery efficiency, and app compatibility. Let\u2019s break down what\u2019s happening, why it matters, and what developers need to know<\/p>\n<h2>Why Memory Pages Matter &#8211;<\/h2>\n<p>Most users never think about memory management, but it plays a critical role in how smooth, fast, and reliable Android feels. A memory page is the smallest chunk of memory that the operating system manages at a time. Until now, Android used 4 KB pages, but starting with Android 15 (API 35), the OS supports 16 KB pages on ARM64 devices.<\/p>\n<p>This shift may feel small, but fewer, larger pages reduce overhead for the OS\u2014unlocking improvements in speed and efficiency.<\/p>\n<h2>The New Policy and Deadlines<\/h2>\n<p>Here\u2019s the key timeline developers need to track: &#8211; Android 15 (API 35) \u2192 Support for 16 KB page sizes introduced. Devices may ship with either 4 KB or 16 KB pages. &#8211; November 1, 2025 \u2192 All new apps and app updates targeting Android 15 or higher must support 16 KB pages to be published on Google Play.<\/p>\n<p>In short: If your app (or its native components like shared libraries) isn\u2019t compatible with 16 KB pages, future submissions may be rejected.<\/p>\n<p>Let discuss what&#8217;s changed &#8211;<\/p>\n<p>1. Platform-Level Support &#8211; Starting in Android 15, ARM64 kernels can run with 16 KB page sizes. &#8211; OEMs and developers can already enable it in custom builds to prepare for the transition.<br \/>\n2. Google Play Enforcement &#8211; From November 1, 2025, Play Store submissions (new apps and updates) targeting API 35+ must work correctly with 16 KB pages.<br \/>\n3. Why It Matters &#8211; Larger pages bring measurable performance gains: &#8211; Faster app launches &#8211; Quicker camera startup &#8211; Smoother boot times &#8211; Better battery life<br \/>\nMuch like the migration to 64-bit architecture, this step future-proofs Android\u2019s memory strategy.<\/p>\n<h2>Visualizing the Change :<\/h2>\n<p>Memory pages are like the drawers of a filing cabinet. The OS stores data inside these drawers and keeps track of which ones are in use.<\/p>\n<ul>\n<li>With 4 KB pages, a 64 KB block is divided into 16 small drawers.<\/li>\n<li>With 16 KB pages, that same block is divided into just 4 bigger drawers.<\/li>\n<\/ul>\n<p>This shift has important effects:<\/p>\n<ul>\n<li>Less Overhead \u2192 The OS has fewer drawers to manage, so bookkeeping becomes simpler and faster.<\/li>\n<li>Faster Access \u2192 Reading\/writing requires fewer lookups.<\/li>\n<li>More Cache-Friendly \u2192 Larger pages reduce Translation Lookaside Buffer (TLB) misses, improving CPU efficiency.<\/li>\n<li>Slight Tradeoff \u2192 If you only need to store a small amount of data, bigger drawers may \u201cwaste\u201d unused space.<\/li>\n<\/ul>\n<div id=\"attachment_76393\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-76393\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-76393\" src=\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison-300x225.png\" alt=\"Visualization of page size\" width=\"300\" height=\"225\" srcset=\"\/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison-300x225.png 300w, \/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison-1024x768.png 1024w, \/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison-768x576.png 768w, \/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison-624x468.png 624w, \/blog\/wp-ttn-blog\/uploads\/2025\/09\/android_page_size_comparison.png 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-76393\" class=\"wp-caption-text\">Visualization of page size<\/p><\/div>\n<h2>How to Check Page Size on Your Device<\/h2>\n<p>Run this in an adb shell:<\/p>\n<pre>\u00a0\r\nadb shell getconf PAGE_SIZE\r\n4096 \u2192 4 KB pages\r\n16384 \u2192 16 KB pages<\/pre>\n<p>Code-Level Considerations for Developers<br \/>\n1. Checking Page Size in Native Code (C\/C++)<br \/>\nIf you\u2019re using the NDK or writing custom allocators, check the page size dynamically:#include &lt;unistd.h&gt;<\/p>\n<pre>#include &lt;stdio.h&gt;\r\n\r\nint main() {\r\nlong page_size = sysconf(_SC_PAGESIZE);\r\nprintf(\"Page size: %ld bytes\\n\", page_size);\r\nreturn 0;\r\n}<\/pre>\n<p>This ensures your app doesn\u2019t assume a fixed 4 KB page size.<\/p>\n<p>2. Kotlin\/Java Example<\/p>\n<pre>import android.os.Build\r\nimport android.system.Os\r\n\r\nfun logPageSize() {\r\nval pageSize = Os.sysconf(Os._SC_PAGESIZE)\r\nprintln(\"Page size: $pageSize bytes\")\r\n\r\nif (pageSize == 16384L) {\r\nprintln(\"Running on a 16 KB page device\")\r\n} else {\r\nprintln(\"Running on a 4 KB page device\")\r\n}\r\n}<\/pre>\n<p><strong>Compatibility Challenges<\/strong><\/p>\n<ul>\n<li>Some legacy native libraries may assume fixed 4 KB pages and could crash or behave unpredictably. Custom memory allocators may need adjustments.<\/li>\n<li>Developers distributing apps outside Google Play may still need to adapt, since OEMs will ship more devices with 16 KB pages.<\/li>\n<\/ul>\n<p><strong>Conclusion<\/strong><\/p>\n<p>Android is reorganizing memory into bigger drawers (16 KB pages). The result: less overhead, faster launches, and smoother overall performance. While invisible to users, this low-level change carries very real benefits.<br \/>\nFor developers, the clock is ticking: by November 2025, Play Store submissions must support 16 KB pages. Preparing now ensures your apps are ready for the next era of Android performance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Google is making a quiet but powerful change under the hood of Android: the default memory page size is shifting from 4 KB to 16 KB. At first glance, this may sound like a minor technical adjustment\u2014but in practice, it has wide-reaching effects on performance, battery efficiency, and app compatibility. Let\u2019s break down what\u2019s [&hellip;]<\/p>\n","protected":false},"author":1555,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":13},"categories":[518],"tags":[4845,5538,8168],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/73626"}],"collection":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/users\/1555"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/comments?post=73626"}],"version-history":[{"count":5,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/73626\/revisions"}],"predecessor-version":[{"id":76530,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/73626\/revisions\/76530"}],"wp:attachment":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/media?parent=73626"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/categories?post=73626"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/tags?post=73626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}