diff --git a/apps/client/src/common/components/view-params-editor/ViewParamsEditor.tsx b/apps/client/src/common/components/view-params-editor/ViewParamsEditor.tsx
index bd5e9b2c0..d30da2fef 100644
--- a/apps/client/src/common/components/view-params-editor/ViewParamsEditor.tsx
+++ b/apps/client/src/common/components/view-params-editor/ViewParamsEditor.tsx
@@ -1,4 +1,4 @@
-import { FormEvent, useEffect } from 'react';
+import { FormEvent, memo, useEffect } from 'react';
 import { useSearchParams } from 'react-router-dom';
 import {
   Button,
@@ -25,8 +25,9 @@ interface EditFormDrawerProps {
   viewOptions: ViewOption[];
 }
 
-// TODO: this is a good candidate for memoisation, but needs the paramFields to be stable
-export default function ViewParamsEditor({ viewOptions }: EditFormDrawerProps) {
+export default memo(ViewParamsEditor);
+
+function ViewParamsEditor({ viewOptions }: EditFormDrawerProps) {
   const [searchParams, setSearchParams] = useSearchParams();
   const { data: viewSettings } = useViewSettings();
 
diff --git a/apps/client/src/features/operator/Operator.tsx b/apps/client/src/features/operator/Operator.tsx
index 1298abcee..57d8abf44 100644
--- a/apps/client/src/features/operator/Operator.tsx
+++ b/apps/client/src/features/operator/Operator.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { useSearchParams } from 'react-router-dom';
 import { isOntimeEvent, OntimeEvent, SupportedEntry } from 'ontime-types';
 import { getFirstEventNormal, getLastEventNormal } from 'ontime-utils';
@@ -107,6 +107,10 @@ export default function Operator() {
   const missingData = !data || !customFields || !projectData;
   const isLoading = status === 'pending' || customFieldStatus === 'pending' || projectDataStatus === 'pending';
 
+  // gather option data
+  const defaultFormat = getDefaultFormat(settings?.timeFormat);
+  const operatorOptions = useMemo(() => getOperatorOptions(customFields, defaultFormat), [customFields, defaultFormat]);
+
   if (missingData || isLoading) {
     return <EmptyPage text='Loading...' />;
   }
@@ -121,8 +125,6 @@ export default function Operator() {
   const main = searchParams.get('main') as keyof TitleFields | null;
   const secondary = searchParams.get('secondary');
 
-  const defaultFormat = getDefaultFormat(settings?.timeFormat);
-  const operatorOptions = getOperatorOptions(customFields, defaultFormat);
   let isPast = Boolean(featureData.selectedEventId);
   const hidePast = isStringBoolean(searchParams.get('hidepast'));
 
diff --git a/apps/client/src/features/viewers/clock/Clock.tsx b/apps/client/src/features/viewers/clock/Clock.tsx
index b0a739cdf..b5454caa3 100644
--- a/apps/client/src/features/viewers/clock/Clock.tsx
+++ b/apps/client/src/features/viewers/clock/Clock.tsx
@@ -1,3 +1,4 @@
+import { useMemo } from 'react';
 import { useSearchParams } from 'react-router-dom';
 import { ProjectData, Settings } from 'ontime-types';
 
@@ -112,7 +113,7 @@ export default function Clock(props: ClockProps) {
   const clean = clock.replace('/:/g', '');
 
   const defaultFormat = getDefaultFormat(settings?.timeFormat);
-  const clockOptions = getClockOptions(defaultFormat);
+  const clockOptions = useMemo(() => getClockOptions(defaultFormat), [defaultFormat]);
 
   return (
     <div
diff --git a/apps/client/src/features/viewers/lower-thirds/LowerThird.tsx b/apps/client/src/features/viewers/lower-thirds/LowerThird.tsx
index d124b0999..539904a9c 100644
--- a/apps/client/src/features/viewers/lower-thirds/LowerThird.tsx
+++ b/apps/client/src/features/viewers/lower-thirds/LowerThird.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { CustomFields, OntimeEvent, ViewSettings } from 'ontime-types';
 import { isPlaybackActive, MILLIS_PER_SECOND } from 'ontime-utils';
 
@@ -95,9 +95,12 @@ export default function LowerThird(props: LowerProps) {
   const textDuration = playState ? `${options.transitionIn * 0.5}s` : `${options.transitionOut * 0.5}s`;
   const textDelay = playState ? `${options.delay + options.transitionIn * 0.5}s` : '0s';
 
+  // gather option data
+  const lowerThirdOptions = useMemo(() => getLowerThirdOptions(customFields), [customFields]);
+
   return (
     <div className='lower-third' style={{ backgroundColor: `#${options.key}` }}>
-      <ViewParamsEditor viewOptions={getLowerThirdOptions(customFields)} />
+      <ViewParamsEditor viewOptions={lowerThirdOptions} />
       <div
         className={`container ${playState ? 'container--in' : 'container--out'}`}
         style={{
diff --git a/apps/client/src/views/backstage/Backstage.tsx b/apps/client/src/views/backstage/Backstage.tsx
index 887052593..152d2b042 100644
--- a/apps/client/src/views/backstage/Backstage.tsx
+++ b/apps/client/src/views/backstage/Backstage.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useMemo, useState } from 'react';
 import QRCode from 'react-qr-code';
 import { useViewportSize } from '@mantine/hooks';
 import { CustomFields, OntimeEvent, ProjectData, Runtime, Settings } from 'ontime-types';
@@ -105,7 +105,10 @@ export default function Backstage(props: BackstageProps) {
 
   // gather option data
   const defaultFormat = getDefaultFormat(settings?.timeFormat);
-  const backstageOptions = getBackstageOptions(defaultFormat, customFields);
+  const backstageOptions = useMemo(
+    () => getBackstageOptions(defaultFormat, customFields),
+    [defaultFormat, customFields],
+  );
 
   return (
     <div className={`backstage ${isMirrored ? 'mirror' : ''}`} data-testid='backstage-view'>
diff --git a/apps/client/src/views/countdown/Countdown.tsx b/apps/client/src/views/countdown/Countdown.tsx
index 69055f559..4e7db1170 100644
--- a/apps/client/src/views/countdown/Countdown.tsx
+++ b/apps/client/src/views/countdown/Countdown.tsx
@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useMemo, useState } from 'react';
 import { IoAdd } from 'react-icons/io5';
 import {
   CustomFields,
@@ -63,7 +63,10 @@ export default function Countdown({
 
   // gather option data
   const defaultFormat = getDefaultFormat(settings?.timeFormat);
-  const countdownOptions = getCountdownOptions(defaultFormat, customFields, subscriptions);
+  const countdownOptions = useMemo(
+    () => getCountdownOptions(defaultFormat, customFields, subscriptions),
+    [defaultFormat, customFields, subscriptions],
+  );
 
   return (
     <div className={`countdown ${isMirrored ? 'mirror' : ''}`} data-testid='countdown-view'>
diff --git a/apps/client/src/views/timeline/TimelinePage.tsx b/apps/client/src/views/timeline/TimelinePage.tsx
index bc444d8b2..1d6980bf2 100644
--- a/apps/client/src/views/timeline/TimelinePage.tsx
+++ b/apps/client/src/views/timeline/TimelinePage.tsx
@@ -45,7 +45,7 @@ export default function TimelinePage(props: TimelinePageProps) {
 
   // populate options
   const defaultFormat = getDefaultFormat(settings?.timeFormat);
-  const progressOptions = getTimelineOptions(defaultFormat);
+  const progressOptions = useMemo(() => getTimelineOptions(defaultFormat), [defaultFormat]);
 
   const titleNow = now?.title ?? '-';
   const dueText = getLocalizedString('timeline.due').toUpperCase();