| ⇢ | A | DummyLogger added | |
| ⇢ | A | Pngquant added |
| ⇢ | A | ImageOptimizer::addOptimizer() added | |
| ⇢ | A | ImageOptimizer::logResult() added | |
| ⇢ | A | DummyLogger::emergency() added | |
| ⇢ | A | DummyLogger::alert() added | |
| ⇢ | A | DummyLogger::critical() added | |
| ⇢ | A | DummyLogger::error() added | |
| ⇢ | A | DummyLogger::warning() added | |
| ⇢ | A | DummyLogger::notice() added | |
| ⇢ | A | DummyLogger::info() added | |
| ⇢ | A | DummyLogger::debug() added | |
| ⋮ | view more | ||
| A | ↘ | B | ImageOptimizer::optimize() got worse |
| A | ↛ | ImageOptimizer::add() removed | |