Lazy load the avatar icons

1 file changed, 5 insertions, 1 deletion

diff --git a/custom/extensions/email-libravatar.lua b/custom/extensions/email-libravatar.lua
index ec35bc9..eceef56 100644
--- a/custom/extensions/email-libravatar.lua
+++ b/custom/extensions/email-libravatar.lua
@@ -92,6 +92,9 @@ function filter_write(text)
 	buffer = buffer .. text
 end
 
+-- A log page can carry one icon per commit, so the attributes let the
+-- browser defer the fetches for icons still off screen and keep decoding
+-- off the critical path.
 function filter_close()
 	if avatar_hash == nil then
 		html(buffer)
@@ -101,7 +104,8 @@ function filter_close()
 			"&d=" .. default_image ..
 			"' width='" .. avatar_size ..
 			"' height='" .. avatar_size ..
-			"' alt='" .. alt_text .. "' /> " .. buffer)
+			"' loading='lazy' decoding='async'" ..
+			" alt='" .. alt_text .. "'> " .. buffer)
 	end
 	return 0
 end