CurrentBuild() public method

Dear people of the future: If you are looking to optimize this, simply create a CurrentBuildSHA(), which can be a lot faster. I presume you came here because of the Project display template, which only needs a SHA.
public CurrentBuild ( ) : false | DNDeployment
return false | DNDeployment
 /**
  * @param \SS_HTTPRequest $request
  * @return \SS_HTTPResponse
  */
 public function redeploy(\SS_HTTPRequest $request)
 {
     $currentBuild = $this->environment->CurrentBuild();
     if (!$currentBuild || !$currentBuild->exists()) {
         return $this->redirect(Controller::join_links($this->environment->Link(\EnvironmentOverview::ACTION_OVERVIEW), 'deployment', 'new'));
     }
     $strategy = $this->environment->Backend()->planDeploy($this->environment, ['sha' => $currentBuild->SHA, 'ref_type' => \GitDispatcher::REF_TYPE_PREVIOUS, 'ref_name' => $currentBuild->RefName]);
     $deployment = $strategy->createDeployment();
     return $this->redirect($deployment->Link());
 }
 /**
  * Create a deployment strategy.
  *
  * @param DNEnvironment $environment
  * @param array $options
  *
  * @return DeploymentStrategy
  */
 public function planDeploy(DNEnvironment $environment, $options)
 {
     $strategy = new DeploymentStrategy($environment, $options);
     $currentBuild = $environment->CurrentBuild();
     $currentSha = $currentBuild ? $currentBuild->SHA : '-';
     if ($currentSha !== $options['sha']) {
         $strategy->setChange('Code version', $currentSha, $options['sha']);
     }
     $strategy->setActionTitle('Confirm deployment');
     $strategy->setActionCode('fast');
     $strategy->setEstimatedTime('2');
     return $strategy;
 }