From 49b161f805dd1b7b6856568cdaf07dbcf681357c Mon Sep 17 00:00:00 2001
From: "Samuel EF. Tinnerholm" <samuel.tinnerholm@gmail.com>
Date: Sun, 24 May 2026 19:47:34 +0300
Subject: [PATCH] =?UTF-8?q?perf:=20replace=20O(n=C2=B2)=20concat=20with=20?=
 =?UTF-8?q?push=20in=20kalshi=20fetcher?=
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Fixes #343
---
 core/src/exchanges/kalshi/fetcher.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/src/exchanges/kalshi/fetcher.ts b/core/src/exchanges/kalshi/fetcher.ts
index 1da5730a..b1623719 100644
--- a/core/src/exchanges/kalshi/fetcher.ts
+++ b/core/src/exchanges/kalshi/fetcher.ts
@@ -474,7 +474,7 @@ export class KalshiFetcher implements IExchangeFetcher<KalshiRawEvent, KalshiRaw
                 const events = data.events || [];
                 if (events.length === 0) break;
 
-                allEvents = allEvents.concat(events);
+                allEvents.push(...events);
 
                 if (targetMarketCount) {
                     for (const event of events) {
@@ -512,7 +512,7 @@ export class KalshiFetcher implements IExchangeFetcher<KalshiRawEvent, KalshiRaw
             const events = data.events || [];
             if (events.length === 0) break;
 
-            allEvents = allEvents.concat(events);
+            allEvents.push(...events);
             cursor = data.cursor;
             page++;
         } while (cursor && page < MAX_PAGES);
@@ -546,7 +546,7 @@ export class KalshiFetcher implements IExchangeFetcher<KalshiRawEvent, KalshiRaw
             page++;
 
             if (events.length === 0) break;
-            allEvents = allEvents.concat(events);
+            allEvents.push(...events);
         } while (cursor && allEvents.length < maxEvents && page < MAX_PAGES);
 
         return {