performance bottlenecks (#233)

Author: techmahedy

PULL_REQUEST.md

@@ -38,11 +38,7 @@ public function chunk($chunkSize, callable $processor, ?int $total = null): void
             $offset += $chunkSize;
 
             // prevent memory leaks
-            // unsetting and invoking garbage collection
             unset($chunkQuery, $results);
-            if (gc_enabled()) {
-                gc_collect_cycles();
-            }
         }
     }
 

src/Phaseolies/Database/Entity/Query/InteractsWithBigDataProcessing.php

@@ -487,9 +487,11 @@ protected function compileAndCache(string $actual, string $cache): void
                     @unlink($tempFile);
                 }
 
-                // Small delay before retry to avoid race conditions
+                // Exponential backoff with jitter to prevent thundering herd
                 if ($retries < self::MAX_COMPILE_RETRIES) {
-                    usleep(10000 * $retries); // 10ms, 20ms, 30ms
+                    $baseDelay = 10000 * (2 ** ($retries - 1)); // 10ms, 20ms, 40ms, 80ms
+                    $jitter = random_int(0, $baseDelay / 4); // ±25% jitter
+                    usleep($baseDelay + $jitter);
                 }
             }
         }