From d0ef99728e2e3279d7bd1fe114880713d05bcf07 Mon Sep 17 00:00:00 2001
From: Stedoss <29103029+Stedoss@users.noreply.github.com>
Date: Sun, 23 Feb 2025 21:54:50 +0000
Subject: [PATCH] Pre-allocate arrays in seperate function

---
 .../kotlin/com/nisemoe/nise/replays/Wtc.kt    | 31 ++++++++++---------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/nise-backend/src/main/kotlin/com/nisemoe/nise/replays/Wtc.kt b/nise-backend/src/main/kotlin/com/nisemoe/nise/replays/Wtc.kt
index d81eb07..6572d7a 100644
--- a/nise-backend/src/main/kotlin/com/nisemoe/nise/replays/Wtc.kt
+++ b/nise-backend/src/main/kotlin/com/nisemoe/nise/replays/Wtc.kt
@@ -189,17 +189,20 @@ class WTC {
         }
 
         private fun seperate(stream: String): FrameLists {
-            val wList = mutableListOf<Int>()
-            val xList = mutableListOf<Short>()
-            val yList = mutableListOf<Short>()
-            val zList = mutableListOf<Byte>()
+            val frames = stream.split(',')
+            val frameCount = frames.size
 
-            for (frame in stream.split(",")) {
+            val ws = IntArray(frameCount)
+            val xs = ShortArray(frameCount)
+            val ys = ShortArray(frameCount)
+            val zs = ByteArray(frameCount)
+
+            for ((i, frame) in frames.withIndex()) {
                 if (frame.isEmpty()) {
                     continue
                 }
 
-                val splitFrame = frame.split("|")
+                val splitFrame = frame.split('|')
                 val w = splitFrame[0].toInt()
                 val x = splitFrame[1].toFloat()
                 val y = splitFrame[2].toFloat()
@@ -216,17 +219,17 @@ class WTC {
                 if (yy <= -0x8000) yy = -0x8000
                 else if (yy >= 0x7FFF) yy = 0x7FFF
 
-                wList.add(w)
-                xList.add(xx.toShort())
-                yList.add(yy.toShort())
-                zList.add(zz.toByte())
+                ws[i] = w
+                xs[i] = xx.toShort()
+                ys[i] = yy.toShort()
+                zs[i] = zz.toByte()
             }
 
             return FrameLists(
-                x = xList.toShortArray(),
-                y = yList.toShortArray(),
-                z = zList.toByteArray(),
-                w = wList.toIntArray(),
+                x = xs,
+                y = ys,
+                z = zs,
+                w = ws,
             )
         }