From d33da83738befb88c385ce004fc64d4222bdac77 Mon Sep 17 00:00:00 2001
From: Akib Azmain Turja <akib@disroot.org>
Date: Thu, 15 Dec 2022 21:40:18 +0600
Subject: [PATCH] cd193ab0ab210a550f680725e07f96f2495b1e9e

---
 blog.html                    |    5 +-
 blog.xml                     |    5 +-
 blog/emacs-lisp-is-fast.html | 1296 ++++++++++++++++++++++++++++++++++
 index.html                   |    3 +-
 4 files changed, 1304 insertions(+), 5 deletions(-)
 create mode 100644 blog/emacs-lisp-is-fast.html
diff --git a/blog.html b/blog.html
index f809fdf..5e788ce 100644
--- a/blog.html
+++ b/blog.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
-<!-- 2022-12-09 Fri 14:49 +06 -->
+<!-- 2022-12-15 Thu 21:42 +06 -->
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <title>Blog Posts | Akib Azmain Turja</title>
@@ -1212,6 +1212,7 @@ body { font-size: 110%; }
 <header>
 <h1 class="title">Blog Posts</h1>
 </header><ul class="org-ul">
+<li><span class="timestamp">[2022-12-15]</span> <a href="blog/emacs-lisp-is-fast.html">Emacs Lisp is Probably Faster Than What You Think</a></li>
 <li><span class="timestamp">[2022-12-09]</span> <a href="blog/why-should-you-maintain-a-changelog.html">Why should you maintain a ChangeLog using version control?</a></li>
 <li><span class="timestamp">[2022-11-25]</span> <a href="blog/introducing-eat.html">Introducing Eat: A New Terminal Emulator for Emacs</a></li>
 <li><span class="timestamp">[2022-11-19]</span> <a href="blog/reading-info-manuals-in-emacs.html">Reading Info manuals in Emacs: Learning Emacs with Emacs</a></li>
@@ -1223,7 +1224,7 @@ body { font-size: 110%; }
 Comments can be send to my email address <a href='mailto:<a href="mailto:akib@disroot.org">akib@disroot.org</a>'><a href="mailto:akib@disroot.org">akib@disroot.org</a></a>.
 </div><br/>
 <div class='footer'>
-<div>Last updated on 2022-12-09 Fri 14:49 +06.<br/>
+<div>Last updated on 2022-12-15 Thu 21:42 +06.<br/>
 Copyright © 2022 Akib Azmain Turja.<br/>
 </div><br/>
 <div>
diff --git a/blog.xml b/blog.xml
index 5f01d20..db45ba5 100644
--- a/blog.xml
+++ b/blog.xml
@@ -14,8 +14,8 @@
   <link></link>
   <description><![CDATA[]]></description>
   <language>en</language>
-  <pubDate>Fri, 09 Dec 2022 14:49:20 +0600</pubDate>
-  <lastBuildDate>Fri, 09 Dec 2022 14:49:20 +0600</lastBuildDate>
+  <pubDate>Thu, 15 Dec 2022 21:42:51 +0600</pubDate>
+  <lastBuildDate>Thu, 15 Dec 2022 21:42:51 +0600</lastBuildDate>
   <generator>Emacs 29.0 Org-mode 9.5.5</generator>
   <webMaster>akib@disroot.org (Akib Azmain Turja)</webMaster>
   <image>
@@ -25,6 +25,7 @@
   </image>
 
   <ul class="org-ul">
+    <li><span class="timestamp">[2022-12-15]</span> <a href="blog/emacs-lisp-is-fast.html">Emacs Lisp is Probably Faster Than What You Think</a></li>
     <li><span class="timestamp">[2022-12-09]</span> <a href="blog/why-should-you-maintain-a-changelog.html">Why should you maintain a ChangeLog using version control?</a></li>
     <li><span class="timestamp">[2022-11-25]</span> <a href="blog/introducing-eat.html">Introducing Eat: A New Terminal Emulator for Emacs</a></li>
     <li><span class="timestamp">[2022-11-19]</span> <a href="blog/reading-info-manuals-in-emacs.html">Reading Info manuals in Emacs: Learning Emacs with Emacs</a></li>
diff --git a/blog/emacs-lisp-is-fast.html b/blog/emacs-lisp-is-fast.html
new file mode 100644
index 0000000..aee32d3
--- /dev/null
+++ b/blog/emacs-lisp-is-fast.html
@@ -0,0 +1,1296 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<!-- 2022-12-15 Thu 21:42 +06 -->
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>Emacs Lisp is Probably Faster Than What You Think | Akib Azmain Turja</title>
+<meta name="author" content="Akib Azmain Turja" />
+<meta name="generator" content="Org Mode" />
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+  /* add a generic configuration mode; LaTeX export needs an additional
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+
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+</style><link rel="me" href="https://hostux.social/@akib"/>
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+        color: #a020f0;
+      }
+      .org-lazy-highlight {
+        /* lazy-highlight */
+        background-color: #afeeee;
+      }
+      .org-line-number-current-line {
+        /* line-number-current-line */
+        color: #7f7f7f;
+        background-color: #ffffff;
+      }
+      .org-line-number-major-tick {
+        /* line-number-major-tick */
+        background-color: #d9d9d9;
+        font-weight: bold;
+      }
+      .org-line-number-minor-tick {
+        /* line-number-minor-tick */
+        background-color: #f2f2f2;
+        font-weight: bold;
+      }
+      .org-link {
+        /* link */
+        color: #3a5fcd;
+        text-decoration: underline;
+      }
+      .org-link-visited {
+        /* link-visited */
+        color: #8b008b;
+        text-decoration: underline;
+      }
+      .org-match {
+        /* match */
+        background-color: #fff68f;
+      }
+      .org-menu {
+      }
+      .org-minibuffer-prompt {
+        /* minibuffer-prompt */
+        color: #0000cd;
+      }
+      .org-mode-line {
+        /* mode-line */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-mode-line-active {
+        /* mode-line-active */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-mode-line-buffer-id {
+        /* mode-line-buffer-id */
+        font-weight: bold;
+      }
+      .org-mode-line-emphasis {
+        /* mode-line-emphasis */
+        font-weight: bold;
+      }
+      .org-mode-line-highlight {
+      }
+      .org-mode-line-inactive {
+        /* mode-line-inactive */
+        color: #333333;
+        background-color: #e5e5e5;
+      }
+      .org-mouse {
+      }
+      .org-mouse-drag-and-drop-region {
+        /* mouse-drag-and-drop-region */
+        background-color: #eedc82;
+      }
+      .org-negation-char {
+      }
+      .org-next-error {
+        /* next-error */
+        background-color: #eedc82;
+      }
+      .org-next-error-message {
+        /* next-error-message */
+        background-color: #b4eeb4;
+      }
+      .org-nobreak-hyphen {
+        /* nobreak-hyphen */
+        color: #a52a2a;
+      }
+      .org-nobreak-space {
+        /* nobreak-space */
+        color: #a52a2a;
+        text-decoration: underline;
+      }
+      .org-org-agenda-calendar-event {
+        /* org-agenda-calendar-event */
+        color: #000000;
+        background-color: #ffffff;
+      }
+      .org-org-agenda-calendar-sexp {
+        /* org-agenda-calendar-sexp */
+        color: #000000;
+        background-color: #ffffff;
+      }
+      .org-org-agenda-clocking {
+        /* org-agenda-clocking */
+        background-color: #ffff00;
+      }
+      .org-org-agenda-column-dateline {
+        /* org-agenda-column-dateline */
+        background-color: #e5e5e5;
+      }
+      .org-org-agenda-current-time {
+        /* org-agenda-current-time */
+        color: #b8860b;
+      }
+      .org-org-agenda-date {
+        /* org-agenda-date */
+        color: #0000ff;
+      }
+      .org-org-agenda-date-today {
+        /* org-agenda-date-today */
+        color: #0000ff;
+        font-weight: bold;
+        font-style: italic;
+      }
+      .org-org-agenda-date-weekend {
+        /* org-agenda-date-weekend */
+        color: #0000ff;
+        font-weight: bold;
+      }
+      .org-org-agenda-date-weekend-today {
+        /* org-agenda-date-weekend-today */
+        color: #0000ff;
+        font-weight: bold;
+        font-style: italic;
+      }
+      .org-org-agenda-diary {
+        /* org-agenda-diary */
+        color: #000000;
+        background-color: #ffffff;
+      }
+      .org-org-agenda-dimmed-todo {
+        /* org-agenda-dimmed-todo-face */
+        color: #7f7f7f;
+      }
+      .org-org-agenda-done {
+        /* org-agenda-done */
+        color: #228b22;
+      }
+      .org-org-agenda-filter-category {
+        /* org-agenda-filter-category */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-org-agenda-filter-effort {
+        /* org-agenda-filter-effort */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-org-agenda-filter-regexp {
+        /* org-agenda-filter-regexp */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-org-agenda-filter-tags {
+        /* org-agenda-filter-tags */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-org-agenda-restriction-lock {
+        /* org-agenda-restriction-lock */
+        background-color: #eeeeee;
+      }
+      .org-org-agenda-structure {
+        /* org-agenda-structure */
+        color: #0000ff;
+      }
+      .org-org-agenda-structure-secondary {
+        /* org-agenda-structure-secondary */
+        color: #0000ff;
+      }
+      .org-org-archived {
+        /* org-archived */
+        color: #7f7f7f;
+      }
+      .org-org-block {
+        /* org-block */
+        color: #7f7f7f;
+      }
+      .org-org-block-begin-line {
+        /* org-block-begin-line */
+        color: #b22222;
+      }
+      .org-org-block-end-line {
+        /* org-block-end-line */
+        color: #b22222;
+      }
+      .org-org-checkbox {
+        /* org-checkbox */
+        font-weight: bold;
+      }
+      .org-org-checkbox-statistics-done {
+        /* org-checkbox-statistics-done */
+        color: #228b22;
+        font-weight: bold;
+      }
+      .org-org-checkbox-statistics-todo {
+        /* org-checkbox-statistics-todo */
+        color: #ff0000;
+        font-weight: bold;
+      }
+      .org-org-cite {
+        /* org-cite */
+        color: #3a5fcd;
+        text-decoration: underline;
+      }
+      .org-org-cite-key {
+        /* org-cite-key */
+        color: #3a5fcd;
+        text-decoration: underline;
+      }
+      .org-org-clock-overlay {
+        /* org-clock-overlay */
+        color: #000000;
+        background-color: #d3d3d3;
+      }
+      .org-org-code {
+        /* org-code */
+        color: #7f7f7f;
+      }
+      .org-org-column {
+        /* org-column */
+        background-color: #e5e5e5;
+      }
+      .org-org-column-title {
+        /* org-column-title */
+        background-color: #e5e5e5;
+        font-weight: bold;
+        text-decoration: underline;
+      }
+      .org-org-date {
+        /* org-date */
+        color: #a020f0;
+        text-decoration: underline;
+      }
+      .org-org-date-selected {
+        /* org-date-selected */
+        color: #ff0000;
+      }
+      .org-org-default {
+        /* org-default */
+        color: #000000;
+        background-color: #ffffff;
+      }
+      .org-org-dispatcher-highlight {
+        /* org-dispatcher-highlight */
+        color: #00008b;
+        background-color: #c6e2ff;
+        font-weight: bold;
+      }
+      .org-org-document-info {
+        /* org-document-info */
+        color: #191970;
+      }
+      .org-org-document-info-keyword {
+        /* org-document-info-keyword */
+        color: #7f7f7f;
+      }
+      .org-org-document-title {
+        /* org-document-title */
+        color: #191970;
+        font-weight: bold;
+      }
+      .org-org-done {
+        /* org-done */
+        color: #228b22;
+        font-weight: bold;
+      }
+      .org-org-drawer {
+        /* org-drawer */
+        color: #0000ff;
+      }
+      .org-org-ellipsis {
+        /* org-ellipsis */
+        color: #b8860b;
+        text-decoration: underline;
+      }
+      .org-org-footnote {
+        /* org-footnote */
+        color: #a020f0;
+        text-decoration: underline;
+      }
+      .org-org-formula {
+        /* org-formula */
+        color: #b22222;
+      }
+      .org-org-headline-done {
+        /* org-headline-done */
+        color: #bc8f8f;
+      }
+      .org-org-headline-todo {
+        /* org-headline-todo */
+        color: #8b0000;
+      }
+      .org-org-hide {
+        /* org-hide */
+        color: #ffffff;
+      }
+      .org-org-imminent-deadline {
+        /* org-imminent-deadline */
+        color: #ff0000;
+        font-weight: bold;
+      }
+      .org-org-latex-and-related {
+        /* org-latex-and-related */
+        color: #8b4513;
+      }
+      .org-org-level-1 {
+        /* org-level-1 */
+        color: #0000ff;
+      }
+      .org-org-level-2 {
+        /* org-level-2 */
+        color: #a0522d;
+      }
+      .org-org-level-3 {
+        /* org-level-3 */
+        color: #a020f0;
+      }
+      .org-org-level-4 {
+        /* org-level-4 */
+        color: #b22222;
+      }
+      .org-org-level-5 {
+        /* org-level-5 */
+        color: #228b22;
+      }
+      .org-org-level-6 {
+        /* org-level-6 */
+        color: #008b8b;
+      }
+      .org-org-level-7 {
+        /* org-level-7 */
+        color: #483d8b;
+      }
+      .org-org-level-8 {
+        /* org-level-8 */
+        color: #8b2252;
+      }
+      .org-org-link {
+        /* org-link */
+        color: #3a5fcd;
+        text-decoration: underline;
+      }
+      .org-org-list-dt {
+        /* org-list-dt */
+        font-weight: bold;
+      }
+      .org-org-macro {
+        /* org-macro */
+        color: #8b4513;
+      }
+      .org-org-meta-line {
+        /* org-meta-line */
+        color: #b22222;
+      }
+      .org-org-mode-line-clock {
+        /* org-mode-line-clock */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-org-mode-line-clock-overrun {
+        /* org-mode-line-clock-overrun */
+        color: #000000;
+        background-color: #ff0000;
+      }
+      .org-org-priority {
+        /* org-priority */
+        color: #a020f0;
+      }
+      .org-org-property-value {
+      }
+      .org-org-quote {
+        /* org-quote */
+        color: #7f7f7f;
+      }
+      .org-org-scheduled {
+        /* org-scheduled */
+        color: #006400;
+      }
+      .org-org-scheduled-previously {
+        /* org-scheduled-previously */
+        color: #b22222;
+      }
+      .org-org-scheduled-today {
+        /* org-scheduled-today */
+        color: #006400;
+      }
+      .org-org-sexp-date {
+        /* org-sexp-date */
+        color: #a020f0;
+      }
+      .org-org-special-keyword {
+        /* org-special-keyword */
+        color: #a020f0;
+      }
+      .org-org-table {
+        /* org-table */
+        color: #0000ff;
+      }
+      .org-org-table-header {
+        /* org-table-header */
+        color: #000000;
+        background-color: #d3d3d3;
+      }
+      .org-org-tag {
+        /* org-tag */
+        font-weight: bold;
+      }
+      .org-org-tag-group {
+        /* org-tag-group */
+        font-weight: bold;
+      }
+      .org-org-target {
+        /* org-target */
+        text-decoration: underline;
+      }
+      .org-org-time-grid {
+        /* org-time-grid */
+        color: #b8860b;
+      }
+      .org-org-todo {
+        /* org-todo */
+        color: #ff0000;
+        font-weight: bold;
+      }
+      .org-org-upcoming-deadline {
+        /* org-upcoming-deadline */
+        color: #b22222;
+      }
+      .org-org-upcoming-distant-deadline {
+        /* org-upcoming-distant-deadline */
+        color: #000000;
+        background-color: #ffffff;
+      }
+      .org-org-verbatim {
+        /* org-verbatim */
+        color: #7f7f7f;
+      }
+      .org-org-verse {
+        /* org-verse */
+        color: #7f7f7f;
+      }
+      .org-org-warning {
+        /* org-warning */
+        color: #ff0000;
+        font-weight: bold;
+      }
+      .org-outline-1 {
+        /* outline-1 */
+        color: #0000ff;
+      }
+      .org-outline-2 {
+        /* outline-2 */
+        color: #a0522d;
+      }
+      .org-outline-3 {
+        /* outline-3 */
+        color: #a020f0;
+      }
+      .org-outline-4 {
+        /* outline-4 */
+        color: #b22222;
+      }
+      .org-outline-5 {
+        /* outline-5 */
+        color: #228b22;
+      }
+      .org-outline-6 {
+        /* outline-6 */
+        color: #008b8b;
+      }
+      .org-outline-7 {
+        /* outline-7 */
+        color: #483d8b;
+      }
+      .org-outline-8 {
+        /* outline-8 */
+        color: #8b2252;
+      }
+      .org-preprocessor {
+        /* font-lock-preprocessor-face */
+        color: #483d8b;
+      }
+      .org-query-replace {
+        /* query-replace */
+        color: #b0e2ff;
+        background-color: #cd00cd;
+      }
+      .org-regexp-grouping-backslash {
+        /* font-lock-regexp-grouping-backslash */
+        font-weight: bold;
+      }
+      .org-regexp-grouping-construct {
+        /* font-lock-regexp-grouping-construct */
+        font-weight: bold;
+      }
+      .org-region {
+        /* region */
+        background-color: #eedc82;
+      }
+      .org-scroll-bar {
+      }
+      .org-secondary-selection {
+        /* secondary-selection */
+        background-color: #ffff00;
+      }
+      .org-separator-line {
+        /* separator-line */
+        background-color: #a0a0a0;
+        font-size: 10%;
+      }
+      .org-shadow {
+        /* shadow */
+        color: #7f7f7f;
+      }
+      .org-show-paren-match {
+        /* show-paren-match */
+        background-color: #40e0d0;
+      }
+      .org-show-paren-match-expression {
+        /* show-paren-match-expression */
+        background-color: #40e0d0;
+      }
+      .org-show-paren-mismatch {
+        /* show-paren-mismatch */
+        color: #ffffff;
+        background-color: #a020f0;
+      }
+      .org-string {
+        /* font-lock-string-face */
+        color: #8b2252;
+      }
+      .org-success {
+        /* success */
+        color: #228b22;
+        font-weight: bold;
+      }
+      .org-tab-bar {
+        /* tab-bar */
+        color: #000000;
+        background-color: #d9d9d9;
+      }
+      .org-tab-bar-tab {
+        /* tab-bar-tab */
+        color: #000000;
+        background-color: #d9d9d9;
+      }
+      .org-tab-bar-tab-group-current {
+        /* tab-bar-tab-group-current */
+        color: #000000;
+        background-color: #d9d9d9;
+        font-weight: bold;
+      }
+      .org-tab-bar-tab-inactive {
+        /* tab-bar-tab-inactive */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-tab-line {
+        /* tab-line */
+        color: #000000;
+        background-color: #d9d9d9;
+        font-size: 90%;
+      }
+      .org-table-cell {
+        /* table-cell */
+        color: #e5e5e5;
+        background-color: #0000ff;
+      }
+      .org-tabulated-list-fake-header {
+        /* tabulated-list-fake-header */
+        font-weight: bold;
+        text-decoration: underline;
+        text-decoration: overline;
+      }
+      .org-tool-bar {
+        /* tool-bar */
+        color: #000000;
+        background-color: #bfbfbf;
+      }
+      .org-tooltip {
+        /* tooltip */
+        color: #000000;
+        background-color: #ffffe0;
+      }
+      .org-trailing-whitespace {
+        /* trailing-whitespace */
+        background-color: #ff0000;
+      }
+      .org-tty-menu-disabled {
+        /* tty-menu-disabled-face */
+        color: #d3d3d3;
+        background-color: #0000ff;
+      }
+      .org-tty-menu-enabled {
+        /* tty-menu-enabled-face */
+        color: #ffff00;
+        background-color: #0000ff;
+        font-weight: bold;
+      }
+      .org-tty-menu-selected {
+        /* tty-menu-selected-face */
+        background-color: #ff0000;
+      }
+      .org-type {
+        /* font-lock-type-face */
+        color: #228b22;
+      }
+      .org-underline {
+        /* underline */
+        text-decoration: underline;
+      }
+      .org-variable-name {
+        /* font-lock-variable-name-face */
+        color: #a0522d;
+      }
+      .org-variable-pitch {
+      }
+      .org-variable-pitch-text {
+        /* variable-pitch-text */
+        font-size: 110%;
+      }
+      .org-vc-conflict-state {
+      }
+      .org-vc-edited-state {
+      }
+      .org-vc-locally-added-state {
+      }
+      .org-vc-locked-state {
+      }
+      .org-vc-missing-state {
+      }
+      .org-vc-needs-update-state {
+      }
+      .org-vc-removed-state {
+      }
+      .org-vc-state-base {
+      }
+      .org-vc-up-to-date-state {
+      }
+      .org-vertical-border {
+      }
+      .org-warning {
+        /* font-lock-warning-face */
+        color: #ff0000;
+        font-weight: bold;
+      }
+      .org-warning-1 {
+        /* warning */
+        color: #ff8c00;
+        font-weight: bold;
+      }
+      .org-window-divider {
+        /* window-divider */
+        color: #999999;
+      }
+      .org-window-divider-first-pixel {
+        /* window-divider-first-pixel */
+        color: #cccccc;
+      }
+      .org-window-divider-last-pixel {
+        /* window-divider-last-pixel */
+        color: #666666;
+      }
+    -->
+</style>
+</head>
+<body>
+<header id="preamble" class="status">
+<div class='navigation'>
+<a href="/index.html">Home</a>
+- <a href="/about.html">About</a>
+- <a href="/blog.html">Blog</a>
+- <a href="/contact.html">Contact</a>
+</div>
+</header>
+<main id="content" class="content">
+<header>
+<h1 class="title">Emacs Lisp is Probably Faster Than What You Think</h1>
+<p class="subtitle" role="doc-subtitle">December 15, 2022</p>
+</header><p>
+Emacs Lisp is the native language of GNU <a href="https://gnu.org/software/emacs">Emacs</a>, an interpreted
+language.  We are used to think that interpreted language are slow.
+Yes, they are indeed slower than compiled languages like C and
+Assembly.  But with the latest additions like JIT, native-compilation
+and various optimizations, they are catching up with compiled
+languages.
+</p>
+
+<p>
+I got the first surprise when I tested <a href="https://gnu.org/software/guile">GNU Guile</a>.  It is really fast,
+as fast as C in many cases, when JIT is enabled.  However, Emacs Lisp
+is not so fast, but it's OK for most use cases.
+</p>
+
+<p>
+But two weeks ago, I got a surprise with Emacs Lisp.  I was
+implementing multi-column character support in <a href="https://codeberg.org/akib/emacs-eat">Eat</a>.  I found an
+efficient way implement this while not breaking existing code.  But it
+had one problem, as you might have already guessed, I needed to find
+all multi-column and zero column (yes, there are some) characters in
+the output.  At first, I used a binary search-like algorithm using
+<code>string-width</code>, as I thought C code is fast.  Not only it produced too
+much garbage, it also didn't work for obvious reason.  Understanding
+the problem, I decided to use <code>char-width</code>.  After the initial
+implementation, I thought it was going to make Eat much slow, since it
+needs to check every character of the output string.  But to my utter
+surprise, it didn't slow down Eat more than 3-4%.  So I happily
+<a href="https://codeberg.org/akib/emacs-eat/commit/9d14bbeaa5c7f5499dcde485ef3a539f8590088e">committed and published it</a>.
+</p>
+
+<p>
+Two days ago, learning from the previous incident, I thought to try
+replacing the regular expressions based output parser with a parses
+output one character at a time.  After implementing it, I tested it.
+But it was not measurably faster than the old code, so I decided to
+abandon the ready to commit change, out of the fear of breaking
+programs.
+</p>
+
+<p>
+But today, I thought to give it another change.  My browser was open
+when I tested back then.  The browser usually takes up all my memory,
+slowing down everything on my 4 GB RAM computer.  But this time the
+browser was not running.  After testing, I found that it is actually
+about 5% faster when Eat is native-compiled, which was more than I
+expected.  That means the Emacs Lisp based parser is faster than thea
+simple regular expression based parser, despite regular expressions
+are implemented in C.  As a bonus, the change didn't make the code
+more complicated (I think it simplified the code instead).  Being
+happy with it, I decided to <a href="https://codeberg.org/akib/emacs-eat/commit/61695d9671368cf216587a28ee2ea9d90ccf4b1a">commit and publish it</a>.
+</p>
+
+<p>
+So the conclusion is that Emacs Lisp can be faster than C when the
+code is efficient and optimized enough.  So before you blame Emacs for
+your slow Emacs Lisp code, first check what you wrote!
+</p>
+</main>
+<footer id="postamble" class="status">
+<hr/><div>
+Comments can be send to my email address <a href='mailto:<a href="mailto:akib@disroot.org">akib@disroot.org</a>'><a href="mailto:akib@disroot.org">akib@disroot.org</a></a>.
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+<div class='footer'>
+<div>Last updated on 2022-12-15 Thu 21:42 +06.<br/>
+Copyright © 2022 Akib Azmain Turja.<br/>
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+Unless otherwise stated, contents are licensed under the terms of the
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diff --git a/index.html b/index.html
index 7227758..e10fd75 100644
--- a/index.html
+++ b/index.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
-<!-- 2022-12-09 Fri 14:49 +06 -->
+<!-- 2022-12-15 Thu 21:42 +06 -->
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <title>Akib Azmain Turja</title>
@@ -1221,6 +1221,7 @@ change over time, and so will this website too.
 <h2 id="org6d18f86">Recent Blogs</h2>
 <div class="outline-text-2" id="text-org6d18f86">
 <ul class="org-ul">
+<li><span class="timestamp">[2022-12-15]</span> <a href="blog/emacs-lisp-is-fast.html">Emacs Lisp is Probably Faster Than What You Think</a></li>
 <li><span class="timestamp">[2022-12-09]</span> <a href="blog/why-should-you-maintain-a-changelog.html">Why should you maintain a ChangeLog using version control?</a></li>
 <li><span class="timestamp">[2022-11-25]</span> <a href="blog/introducing-eat.html">Introducing Eat: A New Terminal Emulator for Emacs</a></li>
 <li><span class="timestamp">[2022-11-19]</span> <a href="blog/reading-info-manuals-in-emacs.html">Reading Info manuals in Emacs: Learning Emacs with Emacs</a></li>
