optimize cache read hot paths

Author: kai-init

src/Cache/CacheSwitch.php

@@ -54,6 +54,12 @@ public function invalidating(): bool
 
     public function epoch(): string
     {
+        $known = $this->runtime->knownEpoch();
+
+        if ($known !== null) {
+            return $known;
+        }
+
         return $this->runtime->epoch(fn(): array => $this->readPair());
     }
 

src/Cache/CanonicalRepository.php

@@ -103,15 +103,9 @@ public function read(
                 continue;
             }
 
-            $row = $this->codec->decodeRowObject($rawRow, $state->epoch);
-
-            if (
-                $row === null
-                || !$plan->primaryKey->matchesToken(
-                    $row->{$plan->primaryKey->column} ?? null,
-                    $token,
-                )
-            ) {
+            $row = $this->codec->decodeRowObject($rawRow, $state->epoch, $plan->primaryKey, $token);
+
+            if ($row === null) {
                 $corrupt = true;
                 $missingAt[$index] = $token;
 

src/Support/QueryIdentity.php

@@ -23,8 +23,10 @@ public function hash(
         string $namespace,
         string $operation,
     ): string {
-        $dependencyHashes = array_values(array_unique($dependencyHashes));
-        sort($dependencyHashes, SORT_STRING);
+        if (count($dependencyHashes) > 1) {
+            $dependencyHashes = array_values(array_unique($dependencyHashes));
+            sort($dependencyHashes, SORT_STRING);
+        }
 
         $prepared = '';
 

tests/Unit/PrimaryKeyMetadataTest.php

@@ -50,6 +50,7 @@ public function test_tokens_must_match_the_canonical_value_representation(): voi
         $integer = new PrimaryKeyMetadata('id', PrimaryKeyMetadata::INTEGER);
         $string = new PrimaryKeyMetadata('uuid', PrimaryKeyMetadata::STRING);
 
+        $this->assertTrue($integer->matchesToken(42, 'i:42'));
         $this->assertTrue($integer->matchesToken('42', 'i:42'));
         $this->assertFalse($integer->matchesToken('42', 's:42'));
         $this->assertFalse($integer->matchesToken('42', 'i:0042'));