[enuddleyarbl]

Originally Posted by JSWolf

Lies Sleeping from sometime in 2019 took about 45 or so seconds to show up in the Calibre viewer. This copy has had no code changes.

I'm running Windows 11.

On my system, a "first time" open of that book (one without a delay) in the viewer takes 7 seconds.

EDIT: In case you're wondering, here's the CSS I'm using in the book (the only things that aren't normal for me are the last two "table" type classes):

@page {
  margin-top: 0;
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 0;
}
body, html {
  /* Basic Styling for HTML and BODY Sections of a File */
  border-width: 0;
  height: 100%;
  margin: 0;
  orphans: 1;
  padding: 0;
  widows: 1;
}
h1, h2 {
  /* Basic Chapter Heading Stlying */
  margin-top: 0.7em;
  margin-bottom: 0.7em;
  page-break-before: always;
  page-break-after: avoid;
  text-align: center;
}
h1 + p, h2 + p, hr + p, .note + p, .placard + p, .song + p {
  /* Non-indented Paragraphs Styling (for paragraphs that follow something and shouldn't be indented) */
  text-indent: 0;
}
h1 + p::first-letter, h2 + p::first-letter, hr + p::first-letter {
  /* First-Letter Styling (for the first letter following certain things (IOW, dropcaps)) */
  font-weight: bold;
}
hr {
  /* Thematic break to use 3 asterisks between parts of story */
  margin-top: 0.9em;
  margin-bottom: 0.9em;
  border: none;
}
hr::before {
  content: "***";
  display: block;
  text-align: center;
}
p {
  /* Basic paragraph styling */
  display: block;
  margin-top: 0;
  margin-bottom: 1;
  text-indent: 1.2em;
}
/* */
/* This whole section is styling for specific page types of a book */
/* */
div.aboutauthorpage p {
  /* About the Author Page Styling */
  margin-left: 5%;
  margin-right: 5%;
}
div.titlepage p {
  text-align: center;
  text-indent: 0;
}
div.acknowledgmentspage p {
  /* Acknowledgments Page Styling */
  margin-left: 5%;
  margin-right: 5%;
  text-align: center;
  text-indent: 0;
}
div.alsobypage p {
  /* Also By Page Styling */
  font-size: small;
  margin-left: 5%;
  margin-right: 5%;
  text-align: center;
  text-indent: 0;
}
div.copyrightpage p {
  /* Copyright Page Styling */
  font-size: small;
  margin-bottom: 0.5em;
  text-align: center;
  text-indent: 0;
}
div.dedicationpage p {
  /* Dedication Page Styling */
  font-size: 90%;
  font-style: italic;
  margin-left: 5%;
  margin-right: 5%;
  text-align: center;
  text-indent: 0;
}
div.epigraphpage p.signature, .signature {
  margin-bottom: 0.5em;
  margin-top: 0.5em;
  text-align: right;
}
div.epigraphpage p {
  /* Epigraph Page Styling */
  font-size: small;
  margin-left: 15%;
  margin-right: 15%;
  text-indent: 0;
}
/* */
/* This is a section for types of chunks on a page */
/* */
div.note {
  /* Letter Styling */
  display: block;
  font-size: 0.88em;
  margin-left: 2em;
  margin-right: 2em;
  text-align: left;
}
div.note p {
  margin-bottom: 1em;
  margin-top: 1em;
  text-indent: 0;
}
div.song {
  /* Song Styling */
  display: block;
  font-size: 0.88em;
  font-style: italic;
  font-weight: bold;
  margin-left: 2em;
  margin-right: 2em;
}
div.song p {
  padding-left: 3em;
  text-indent: -3em;
  text-align: left;
}
/* */
/* A styling section for things that apply everywhere */
/* */
.placard {
  /* Styling for a placard or headline */
  font-size: 0.88em;
  font-weight: bold;
  margin-bottom: 2em;
  margin-top: 2em;
  text-align: center;
  text-indent: 0;
}
.smallcaps {
  /* Smallcaps styling (text should be typed normally and will be smallcapped) */
  font-variant: small-caps;
}
table#table001 {
  table-layout: fixed;
  width: 100%;
  border-collapse: separate;
  border-spacing: 5px;
  border: 1px black solid;
}
table#table001 td {
  width: 50%;
  border: 0;
  padding: 2px;
}