Optimized dictZip

Author: Anton Kuznetsov

src/GPT3Encoder/Gpt3Encoder.php

@@ -134,13 +134,16 @@ private function myFilter($var): bool
 
  private function dictZip(array $x): array
  {
- $result = [];
- $cnt = 0;
- foreach ($x as $i) {
- if (isset($i[1], $i[0])) {
- $result[$i[0] . ',' . $i[1]] = $cnt;
- $cnt++;
+ if (!$result = $this->cache->get('dictZip')) {
+ $result = [];
+ $cnt = 0;
+ foreach ($x as $i) {
+ if (isset($i[1], $i[0])) {
+ $result[$i[0] . ',' . $i[1]] = $cnt;
+ $cnt++;
+ }
  }
+ $this->cache->set('dictZip', $result);
  }
  return $result;