Browser noticeably slower since last update

[wooque]

Description

Browser is noticeably slower since last update (version 100.0.4896.60). Even simple sites take few seconds to fully load, like Hackernews

Steps to reproduce

1. Open some simple site like https://news.ycombinator.com/item?id=30926834

Actual result

Site opens relatively quckly but it takes few seconds to render fully (upvoat arrows show up after few seconds)

Expected result

Site opens and renders almost instantly

Issue reproduces how often

Easily reproduced

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version? Yes
• Can you reproduce this issue with the current Play Store Beta version? /
• Can you reproduce this issue with the current Play Store Nightly version? /

Device details

• Install type (ARM, x86): ARM
• Device type (Phone, Tablet, Phablet): Phone (Xiaomi Redmi Note 4)
• Android version: 11

Brave version

Brave	1.37.110 Chromium: 100.0.4896.60 (Official Build) (64-bit)
Revision	6a5d10861ce8de5fce22564658033b43cb7de047-refs/branch-heads/4896@{#875}
OS	Android 11; Build/RQ3A.211001.001
Google Play services	SDK=12451000; Installed=220920037; Access=3p
JavaScript	V8 10.0.139.8
User Agent	Mozilla/5.0 (Linux; Android 11) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Mobile Safari/537.36
Command Line	--use-mobile-user-agent --top-controls-show-threshold=0.5 --top-controls-hide-threshold=0.5 --use-mobile-user-agent --enable-viewport --validate-input-event-stream --enable-longpress-drag-selection --touch-selection-strategy=direction --disable-composited-antialiasing --enable-dom-distiller --disable-client-side-phishing-detection --disable-domain-reliability --no-pings --component-updater=url-source=https://go-updater.brave.com/extensions --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --sync-url=https://sync-v2.brave.com/v2 --lso-url=https://no-thanks.invalid --variations-server-url=https://variations.brave.com/seed --variations-insecure-server-url=https://variations.brave.com/seed --flag-switches-begin --disable-features=NativeBraveWallet --flag-switches-end --disable-background-media-suspend --no-restore-state
Executable Path	No such file or directory
Profile Path	/data/user/0/com.brave.browser/app_chrome/Default
Variations	AdRewardsStudy:NextPaymentDayAdServingStudy:DefaultAdNotificationsPerHour=10/MaximumAdNotificationsPerDay=100/MaximumInlineContentAdsPerHour=12/MaximumInlineContentAdsPerDay=60BraveAds.UserActivityStudy:Triggers=EMPTY/Threshold=0.0/IdleTimeThreshold=5BraveDebounceStudy:EnabledConversionsStudy:NewDefaultPatternDefault1pBlockingStudy:DisabledDisableCnameUncloakingForAndroid:DisabledEphemeralStorageStudy:EnabledExtendedVariationsSafeMode5:Default5FirstPartyEphemeralDomainBlockStudy:DefaultForceDisableBlinkFeatures:EnabledPartitionBlinkMemoryCacheStudy:EnabledPartitionConnectionsByNetworkIsolationKeyStudy:EnabledPermissionLifetimeReleaseStudy:EnabledRequestAdsEnabledApiStudy:EnabledVulkanStudy:Disabled

Website problems only

• Does the issue resolve itself when disabling Brave Shields? Seems it's faster but still even with Shields disabled it's a tad slower than Bromite for example
• Does the issue resolve itself when disabling Brave Rewards? /
• Is the issue reproducible on the latest version of Chrome? /

Additional information

[mavdl2117]

Same here, but duplicate of #22030