diff --git a/modules/audio_processing/agc2/biquad_filter.cc b/modules/audio_processing/agc2/biquad_filter.cc
index 453125f..c1b80d7 100644
--- a/modules/audio_processing/agc2/biquad_filter.cc
+++ b/modules/audio_processing/agc2/biquad_filter.cc
@@ -31,17 +31,30 @@
 void BiQuadFilter::Process(rtc::ArrayView<const float> x,
                            rtc::ArrayView<float> y) {
   RTC_DCHECK_EQ(x.size(), y.size());
-  for (size_t k = 0; k < x.size(); ++k) {
+  const float config_a0 = config_.a[0];
+  const float config_a1 = config_.a[1];
+  const float config_b0 = config_.b[0];
+  const float config_b1 = config_.b[1];
+  const float config_b2 = config_.b[2];
+  float state_a0 = state_.a[0];
+  float state_a1 = state_.a[1];
+  float state_b0 = state_.b[0];
+  float state_b1 = state_.b[1];
+  for (size_t k = 0, x_size = x.size(); k < x_size; ++k) {
     // Use a temporary variable for `x[k]` to allow in-place processing.
     const float tmp = x[k];
-    y[k] = config_.b[0] * tmp + config_.b[1] * state_.b[0] +
-           config_.b[2] * state_.b[1] - config_.a[0] * state_.a[0] -
-           config_.a[1] * state_.a[1];
-    state_.b[1] = state_.b[0];
-    state_.b[0] = tmp;
-    state_.a[1] = state_.a[0];
-    state_.a[0] = y[k];
+    float y_k = config_b0 * tmp + config_b1 * state_b0 + config_b2 * state_b1 -
+                config_a0 * state_a0 - config_a1 * state_a1;
+    state_b1 = state_b0;
+    state_b0 = tmp;
+    state_a1 = state_a0;
+    state_a0 = y_k;
+    y[k] = y_k;
   }
+  state_.a[0] = state_a0;
+  state_.a[1] = state_a1;
+  state_.b[0] = state_b0;
+  state_.b[1] = state_b1;
 }
 
 }  // namespace webrtc