From 95b32937d6b8827e4b26554f541db86ca828b1c8 Mon Sep 17 00:00:00 2001
From: metonym <ericyl.us@gmail.com>
Date: Sun, 5 Jun 2022 14:24:37 -0700
Subject: [PATCH] perf(data-table): save rows reference when reducing (#1338)

https://github.com/carbon-design-system/carbon-components-svelte/commit/d2cdb8eb0f5a1bdf3e7e8d01ae859542d470c9d4#r75383503
---
 src/DataTable/DataTable.svelte | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/src/DataTable/DataTable.svelte b/src/DataTable/DataTable.svelte
index f1472a06..7d1954ae 100644
--- a/src/DataTable/DataTable.svelte
+++ b/src/DataTable/DataTable.svelte
@@ -199,17 +199,14 @@
   }
   $: if (radio || batchSelection) selectable = true;
   $: headerKeys = headers.map(({ key }) => key);
-  $: tableCellsByRowId = rows.reduce(
-    (rows, row) => ({
-      ...rows,
-      [row.id]: headerKeys.map((key, index) => ({
-        key,
-        value: resolvePath(row, key),
-        display: headers[index].display,
-      })),
-    }),
-    {}
-  );
+  $: tableCellsByRowId = rows.reduce((rows, row) => {
+    rows[row.id] = headerKeys.map((key, index) => ({
+      key,
+      value: resolvePath(row, key),
+      display: headers[index].display,
+    }));
+    return rows;
+  }, {});
   $: $tableRows = rows;
   $: sortedRows = [...$tableRows];
   $: ascending = sortDirection === "ascending";