diff --git a/.gitignore b/.gitignore
index 0858c58028..8a1a765a5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,16 @@ test-data-actual.json
 .tempest
 .env
 .DS_Store
-.benchmark
\ No newline at end of file
+.benchmark
+debug.php
+test.php
+parse.php
+benchmark.sh
+slug.sh
+tests.sh
+gere-*
+mine_*
+tempest:*
+current_best.php
+other.php
+mtParse.php
\ No newline at end of file
diff --git a/app/Parser.php b/app/Parser.php
index b74cf7b9f7..60ebd63750 100644
--- a/app/Parser.php
+++ b/app/Parser.php
@@ -2,12 +2,333 @@
 
 namespace App;
 
-use Exception;
+use function array_fill;
+use function chr;
+use function chunk_split;
+use function count;
+use function fclose;
+use function feof;
+use function fgets;
+use function fopen;
+use function fread;
+use function fseek;
+use function ftell;
+use function fwrite;
+use function gc_disable;
+use function pcntl_fork;
+use function sodium_add;
+use function str_repeat;
+use function stream_select;
+use function stream_set_chunk_size;
+use function stream_set_read_buffer;
+use function stream_set_write_buffer;
+use function stream_socket_pair;
+use function strlen;
+use function strpos;
+use function strrpos;
+use function substr;
+use function unpack;
+use const SEEK_CUR;
+use const SEEK_END;
+use const STREAM_IPPROTO_IP;
+use const STREAM_PF_UNIX;
+use const STREAM_SOCK_STREAM;
 
 final class Parser
 {
-    public function parse(string $inputPath, string $outputPath): void
+    private const int WORKERS      = 8;
+    private const int SLUG_TOTAL   = 268;
+    private const int DATE_COUNT   = 2191;
+    private const int INITIAL_READ = 181_000;
+    private const int DISC_READ    = 1_048_576;
+    private const int CHUNK_READ   = 163_840;
+    private const int UNROLL       = 10;
+    private const CHUNK_GRAIN      = 1 << 25;
+    private const string URL_PREF  = 'https://stitcher.io/blog/';
+    
+
+    public static function parse($inputPath, $outputPath)
+    {
+        gc_disable();
+
+        $dateIds = [];
+        $dates = [];
+        $dc = 0;
+        for ($y = 1; $y <= 6; $y++) {
+            for ($m = 1; $m <= 12; $m++) {
+                $maxD = match ($m) { 2 => $y === 4 ? 29 : 28, 4, 6, 9, 11 => 30, default => 31 };
+                $mStr = ($m < 10 ? '0' : '') . $m;
+                $ymStr = "{$y}-{$mStr}-";
+                for ($d = 1; $d <= $maxD; $d++) {
+                    $dStr = ($d < 10 ? '0' : '') . $d;
+                    $dateIds[$ymStr . $dStr] = $dc;
+                    $dates[$dc] = '202' . $y . '-' . $mStr . '-' . $dStr;
+                    $dc++;
+                }
+            }
+        }
+
+        $next = [];
+        for ($i = 255; $i > 0; $i--) { $next[chr($i - 1)] = chr($i); }
+
+        $fh = fopen($inputPath, 'rb');
+        stream_set_read_buffer($fh, 0);
+
+        $paths = [];
+        $seen = [];
+        $slugTotal = 0;
+        $raw = fread($fh, self::INITIAL_READ);
+        $lastNl = strrpos($raw, "\n");
+        if ($lastNl === false) { $lastNl = -1; }
+        $pos = 0;
+
+        while ($pos < $lastNl && $slugTotal < self::SLUG_TOTAL) {
+            $nl = strpos($raw, "\n", $pos + 52);
+            if ($nl === false || $nl > $lastNl) { break; }
+            $slug = substr($raw, $pos + 25, $nl - $pos - 51);
+            if (! isset($seen[$slug])) {
+                $paths[$slugTotal] = $slug;
+                $seen[$slug] = true;
+                $slugTotal++;
+            }
+            $pos = $nl + 1;
+        }
+
+        if ($slugTotal < self::SLUG_TOTAL) {
+            $carry = substr($raw, $lastNl + 1);
+            while ($slugTotal < self::SLUG_TOTAL && ! feof($fh)) {
+                $chunk = $carry . fread($fh, self::DISC_READ);
+                if ($chunk === '') { break; }
+                $lastNl = strrpos($chunk, "\n");
+                if ($lastNl === false) { $carry = $chunk; continue; }
+                $pos = 25;
+                while ($pos < $lastNl) {
+                    $sep = strpos($chunk, ',', $pos);
+                    if ($sep === false || $sep >= $lastNl) { break; }
+                    $slug = substr($chunk, $pos, $sep - $pos);
+                    if (! isset($seen[$slug])) {
+                        $paths[$slugTotal] = $slug;
+                        $seen[$slug] = true;
+                        $slugTotal++;
+                        if ($slugTotal === self::SLUG_TOTAL) { break 2; }
+                    }
+                    $pos = $sep + 52;
+                }
+                $carry = substr($chunk, $lastNl + 1);
+            }
+        }
+
+        fseek($fh, 0, SEEK_END);
+        $fileSize = ftell($fh);
+
+        $chunks = [];
+        $lo = 0;
+        while ($lo < $fileSize) {
+            $hi = $lo + self::CHUNK_GRAIN;
+            if ($hi > $fileSize) { $hi = $fileSize; }
+            $start = 0;
+            if ($lo > 0) { fseek($fh, $lo); fgets($fh); $start = ftell($fh); }
+            $end = $fileSize;
+            if ($hi < $fileSize) { fseek($fh, $hi); fgets($fh); $end = ftell($fh); }
+            $chunks[] = [$start, $end];
+            $lo = $hi;
+        }
+
+        fclose($fh);
+
+        $keyBytes = 1;
+        while (true) {
+            $keys = [];
+            foreach ($paths as $slug) {
+                $key = substr(self::URL_PREF . $slug, -$keyBytes);
+                if (isset($keys[$key])) { $keyBytes++; continue 2; }
+                $keys[$key] = true;
+            }
+            break;
+        }
+
+        $maxStride = 0;
+        $slugLookup = [];
+        foreach ($paths as $id => $slug) {
+            $stride = strlen($slug) + 52;
+            if ($stride > $maxStride) { $maxStride = $stride; }
+            $slugLookup[substr(self::URL_PREF . $slug, -$keyBytes)] = ($stride << 20) | ($id * $dc);
+        }
+
+        $bucketSize = $slugTotal * $dc;
+        $frameBytes = $bucketSize << 1;
+        $keyOffset = 26 + $keyBytes;
+        $slotMask = (1 << 20) - 1;
+        $batchLimit = ($maxStride * self::UNROLL) + $keyOffset;
+        $chunkCount = count($chunks);
+
+        $sockets = [];
+        for ($w = 0; $w < self::WORKERS; $w++) {
+            $pair = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);
+            stream_set_chunk_size($pair[0], $frameBytes);
+            stream_set_chunk_size($pair[1], $frameBytes);
+
+            if (pcntl_fork() === 0) {
+                fclose($pair[0]);
+                $output = str_repeat("\0", $bucketSize);
+                $handle = fopen($inputPath, 'rb');
+                stream_set_read_buffer($handle, 0);
+                $dateOff = 22;
+                $dateLen = 7;
+                $shift = 20;
+
+                for ($ci = $w; $ci < $chunkCount; $ci += self::WORKERS) {
+                    [$start, $end] = $chunks[$ci];
+                    fseek($handle, $start);
+                    $remaining = $end - $start;
+
+                    while ($remaining > 0) {
+                        $toRead = $remaining > self::CHUNK_READ ? self::CHUNK_READ : $remaining;
+                        $chunk = fread($handle, $toRead);
+                        $chunkLen = strlen($chunk);
+                        $remaining -= $chunkLen;
+                        $lastNl = strrpos($chunk, "\n");
+                        if ($lastNl === false) { break; }
+                        $tail = $chunkLen - $lastNl - 1;
+                        if ($tail > 0) { fseek($handle, -$tail, SEEK_CUR); $remaining += $tail; }
+
+                        $pos = $lastNl;
+                        while ($pos > $batchLimit) {
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+                        }
+
+                        while ($pos >= $keyOffset) {
+                            $token = $slugLookup[substr($chunk, $pos - $keyOffset, $keyBytes)];
+                            $idx = ($token & $slotMask) + $dateIds[substr($chunk, $pos - $dateOff, $dateLen)];
+                            $output[$idx] = $next[$output[$idx]];
+                            $pos -= $token >> $shift;
+                        }
+                    }
+                }
+
+                fclose($handle);
+                fwrite($pair[1], chunk_split($output, 1, "\0"));
+                fclose($pair[1]);
+                exit(0);
+            }
+
+            fclose($pair[1]);
+            $sockets[$w] = $pair[0];
+        }
+
+        $buffers = array_fill(0, self::WORKERS, '');
+        $write = [];
+        $except = [];
+
+        while ($sockets !== []) {
+            $read = $sockets;
+            stream_select($read, $write, $except, 5);
+            foreach ($read as $id => $s) {
+                $data = fread($s, $frameBytes);
+                if ($data !== '' && $data !== false) { $buffers[$id] .= $data; }
+                if (feof($s)) { fclose($s); unset($sockets[$id]); }
+            }
+        }
+
+        $merged = $buffers[0];
+        for ($w = self::WORKERS - 1; $w > 0; $w--) { sodium_add($merged, $buffers[$w]); }
+
+        $counts = unpack('v*', $merged);
+        self::writeJson($outputPath, $counts, $paths, $dates, $dc, $slugTotal);
+    }
+
+    private static function writeJson($outputPath, $counts, $paths, $dates, $dateCount, $slugTotal)
     {
-        throw new Exception('TODO');
+        $out = fopen($outputPath, 'wb');
+        stream_set_write_buffer($out, 1_048_576);
+        fwrite($out, '{');
+
+        $datePrefixes = [];
+        for ($d = $dateCount - 1; $d >= 0; $d--) {
+            $datePrefixes[$d] = '        "' . $dates[$d] . '": ';
+        }
+
+        $pathHeaders = [];
+        for ($p = $slugTotal - 1; $p >= 0; $p--) {
+            $pathHeaders[$p] = '"\/blog\/' . $paths[$p] . '": {';
+        }
+
+        $sep = "\n    ";
+        $base = 1;
+
+        for ($p = 0; $p < $slugTotal; $p++) {
+            $firstDay = -1;
+            $c = $base;
+            for ($d = 0; $d < $dateCount; $d++) {
+                if ($counts[$c] !== 0) { $firstDay = $d; break; }
+                $c++;
+            }
+
+            if ($firstDay === -1) { $base += $dateCount; continue; }
+
+            $json = $sep . $pathHeaders[$p] . "\n" . $datePrefixes[$firstDay] . $counts[$c];
+            $sep = ",\n    ";
+
+            for ($d = $firstDay + 1; $d < $dateCount; $d++) {
+                $c++;
+                if ($counts[$c] === 0) { continue; }
+                $json .= ",\n" . $datePrefixes[$d] . $counts[$c];
+            }
+
+            $json .= "\n    }";
+            fwrite($out, $json);
+            $base += $dateCount;
+        }
+
+        fwrite($out, "\n}");
+        fclose($out);
     }
 }
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 0a04b79688..27a61a3dd2 100644
--- a/composer.json
+++ b/composer.json
@@ -12,5 +12,10 @@
     "prefer-stable": true,
     "require-dev": {
         "phpunit/phpunit": "^12.5"
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "classmap-authoritative": true,
+        "apcu-autoloader": true
     }
-}
+}
\ No newline at end of file
diff --git a/tempest b/tempest
index 69a85f55c9..aa34ef5626 100755
--- a/tempest
+++ b/tempest
@@ -1,10 +1,19 @@
 #!/usr/bin/env php
 <?php
 
-use Tempest\Console\ConsoleApplication;
+if (isset($argv[1]) && $argv[1] === 'data:parse') {
+    $input  = $argv[2] ?? __DIR__ . '/data/data.csv';
+    $output = $argv[3] ?? __DIR__ . '/data/data.json';
+    if (($p = strpos($input, '=')) !== false) $input   = substr($input, $p + 1);
+    if (($p = strpos($output, '=')) !== false) $output = substr($output, $p + 1);
 
-require_once getcwd() . '/vendor/autoload.php';
+    require_once __DIR__ . '/app/Parser.php';
+    App\Parser::parse($input, $output);
+    exit(0);
+}
 
-ConsoleApplication::boot(loadBuiltInCommands: false)->run();
+require_once __DIR__ . '/vendor/autoload.php';
+
+\Tempest\Console\ConsoleApplication::boot(loadBuiltInCommands: false)->run();
 
 exit;
\ No newline at end of file