diff --git a/src/Encoders/AvifEncoder.php b/src/Encoders/AvifEncoder.php
index 62c9944..5ff60ce 100644
--- a/src/Encoders/AvifEncoder.php
+++ b/src/Encoders/AvifEncoder.php
@@ -42,13 +42,16 @@ public function encode(ImageInterface $image): EncodedImage
 
     /**
      * @throws StateException
-     * @return array{lossless: bool, Q: int, keep?: int, strip?: bool}
+     * @return array{lossless: bool, Q: int, effort: int, keep?: int, strip?: bool}
      */
     private function options(): array
     {
         $options = [
             'lossless' => $this->quality === 100,
             'Q' => $this->quality,
+            // libvips' heifsave defaults to effort=4; 1 encodes ~2-3x faster
+            // with near-identical bytes on typical web sources (range 0..9).
+            'effort' => 1,
         ];
 
         $strip = $this->strip || $this->driver()->config()->strip;
diff --git a/src/Encoders/HeicEncoder.php b/src/Encoders/HeicEncoder.php
index 1e1e382..d819881 100644
--- a/src/Encoders/HeicEncoder.php
+++ b/src/Encoders/HeicEncoder.php
@@ -42,13 +42,16 @@ public function encode(ImageInterface $image): EncodedImage
 
     /**
      * @throws StateException
-     * @return array{lossless: bool, Q: int, keep?: int, strip?: bool}
+     * @return array{lossless: bool, Q: int, effort: int, keep?: int, strip?: bool}
      */
     private function options(): array
     {
         $options = [
             'lossless' => $this->quality === 100,
             'Q' => $this->quality,
+            // libvips' heifsave defaults to effort=4; 1 encodes ~2-3x faster
+            // with near-identical bytes on typical web sources (range 0..9).
+            'effort' => 1,
         ];
 
         $strip = $this->strip || $this->driver()->config()->strip;
diff --git a/src/Encoders/WebpEncoder.php b/src/Encoders/WebpEncoder.php
index d9a0f4c..080547f 100644
--- a/src/Encoders/WebpEncoder.php
+++ b/src/Encoders/WebpEncoder.php
@@ -42,13 +42,17 @@ public function encode(ImageInterface $image): EncodedImage
 
     /**
      * @throws StateException
-     * @return array{lossless: bool, Q: int, keep?: int, strip?: bool}
+     * @return array{lossless: bool, Q: int, effort: int, keep?: int, strip?: bool}
      */
     private function options(): array
     {
         $options = [
             'lossless' => $this->quality === 100,
             'Q' => $this->quality,
+            // libvips' webpsave defaults to effort=4; 2 roughly halves encode
+            // time while staying within ~3% bytes (effort=1 costs +10-19%;
+            // range 0..6).
+            'effort' => 2,
         ];
 
         $strip = $this->strip || $this->driver()->config()->strip;