+ public function updateRuntimeAdaptiveExpiry( $ttl ) {
+ $this->mMaxAdaptiveExpiry = min( $ttl, $this->mMaxAdaptiveExpiry );
+ $this->updateCacheExpiry( $ttl );
+ }
+
+ /**
+ * Call this when parsing is done to lower the TTL based on low parse times
+ *
+ * @since 1.28
+ */
+ public function finalizeAdaptiveCacheExpiry() {
+ if ( is_infinite( $this->mMaxAdaptiveExpiry ) ) {
+ return; // not set
+ }
+
+ $runtime = $this->getTimeSinceStart( 'wall' );
+ if ( is_float( $runtime ) ) {
+ $slope = ( self::SLOW_AR_TTL - self::FAST_AR_TTL )
+ / ( self::PARSE_SLOW_SEC - self::PARSE_FAST_SEC );
+ // SLOW_AR_TTL = PARSE_SLOW_SEC * $slope + $point
+ $point = self::SLOW_AR_TTL - self::PARSE_SLOW_SEC * $slope;
+
+ $adaptiveTTL = min(
+ max( $slope * $runtime + $point, self::MIN_AR_TTL ),
+ $this->mMaxAdaptiveExpiry
+ );
+ $this->updateCacheExpiry( $adaptiveTTL );
+ }
+ }
+