HTML-ify message bodies once, on receipt, and not every time the message is rendered.

~16% of the `hi development` channel's rendering time was taken up on this.

2 files changed, 3 insertions, 7 deletions

diff --git a/ui/lib/components/Message.svelte b/ui/lib/components/Message.svelte
index 0c8eeec..fddeecd 100644
--- a/ui/lib/components/Message.svelte
+++ b/ui/lib/components/Message.svelte
@@ -1,15 +1,11 @@
 <script>
-  import { marked } from 'marked';
-  import DOMPurify from 'dompurify';
-
   import { deleteMessage } from '$lib/apiServer';
 
   function scroll(message) {
     message.scrollIntoView();
   }
 
-  let { id, at, body, editable = false } = $props();
-  let renderedBody = $derived(DOMPurify.sanitize(marked.parse(body, { breaks: true })));
+  let { id, at, body, renderedBody, editable = false } = $props();
   let deleteArmed = $state(false);
 
   function onDelete(event) {
diff --git a/ui/lib/components/MessageRun.svelte b/ui/lib/components/MessageRun.svelte
index 83a82a9..39ee155 100644
--- a/ui/lib/components/MessageRun.svelte
+++ b/ui/lib/components/MessageRun.svelte
@@ -16,7 +16,7 @@
   <span class="chip variant-soft sticky top-o left-0">
     @{name}:
   </span>
-  {#each messages as { id, at, body }}
-    <Message {id} {at} {body} editable={ownMessage} />
+  {#each messages as { id, at, body, renderedBody }}
+    <Message {id} {at} {body} {renderedBody} editable={ownMessage} />
   {/each}
 </div>