Same thing here but not only on the MBP but in the iMac as well. I blamed the internet connection in the beginning but then I noticed Chrome and Mozilla were doing way better. Safari freezes a lot on most of videos ( YouTube and FB ) and is getting annoying. Also noticed this on iTunes since I have AppleMusic, it takes a lot to play a song and most of the times, don't even continue to play. Spotify runs smoothly.
I don't think is a bad installation, both machines were perfect before the install and the MBP had as a clean installation, brand new SSD, the iMac had it as an update. I did both NVRAM and PRAM memory reset with no fix on the speed or fix on video and music loading. This is getting very annoying since I work on these two in a daily basis. Here's my report from EtreCheck.
EtreCheck version: 3.4.6 (460)
Report generated 2017-11-21 23:19:26
Download EtreCheck from https://etrecheck.com
Runtime: 2:24
Performance: Excellent
Click the [Lookup] links for more information from Apple Support Communities.
Click the [Details] links for more information about that line.
Problem: No problem - just checking
Hardware Information:ⓘ
MacBook Pro (13-inch, Mid 2012)
[Technical Specifications] - [User Guide] -
MacBook Pro - model: MacBookPro9,2
1 2.9 GHz Intel Core i7 (i7-3520M) CPU: 2-core
16 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 GB DDR3 1600 MHz ok
Handoff/Airdrop2: supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Normal - Cycle count = 4
Video Information:ⓘ
Intel HD Graphics 4000 - VRAM: 1536 MB
Color LCD 1280 x 800
Disk Information:ⓘ
Crucial_CT512MX100SSD1 disk0: (512.11 GB) (Solid State - TRIM: No)
[Show SMART report]
EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB
(disk0s2) <not mounted> [APFS Container]: 511.90 GB
HL-DT-ST DVDRW GS31N ()
USB Information:ⓘ
USB20Bus
hub_device
hub_device
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
USB20Bus
hub_device
Apple Inc. FaceTime HD Camera (Built-in)
USB30Bus
Thunderbolt Information:ⓘ
Apple Inc. thunderbolt_bus
Virtual disks:ⓘ
Macintosh SSD (disk1s1 - APFS) / [Startup]: 511.90 GB (421.32 GB free)
Physical disk: disk0s2 511.90 GB (421.32 GB free)
(disk1s2) <not mounted> [Preboot]: 511.90 GB
Physical disk: disk0s2 511.90 GB
(disk1s3) <not mounted> [Recovery]: 511.90 GB
Physical disk: disk0s2 511.90 GB
(disk1s4) /private/var/vm [VM]: 511.90 GB
Physical disk: disk0s2 511.90 GB
System Software:ⓘ
macOS High Sierra 10.13.1 (17B48) - Time since boot: less than an hour
Gatekeeper:ⓘ
Mac App Store and identified developers
Kernel Extensions:ⓘ
/Applications/VMware Fusion.app
[not loaded] com.vmware.kext.vmci (10.0.0) [Lookup]
[not loaded] com.vmware.kext.vmioplug.17.1.2 (10.0.0) [Lookup]
[not loaded] com.vmware.kext.vmnet (10.0.0) [Lookup]
[not loaded] com.vmware.kext.vmx86 (10.0.0) [Lookup]
System Launch Agents:ⓘ
[not loaded] 8 Apple tasks
[loaded] 176 Apple tasks
[running] 104 Apple tasks
System Launch Daemons:ⓘ
[not loaded] 37 Apple tasks
[loaded] 185 Apple tasks
[running] 107 Apple tasks
Launch Agents:ⓘ
[not loaded] com.adobe.AAM.Updater-1.0.plist (Adobe Systems, Inc. - installed 2017-11-04) [Lookup]
[not loaded] com.teamviewer.teamviewer.plist (TeamViewer GmbH - installed 2017-11-03) [Lookup]
[not loaded] com.teamviewer.teamviewer_desktop.plist (TeamViewer GmbH - installed 2017-08-24) [Lookup]
Launch Daemons:ⓘ
[loaded] com.adobe.SwitchBoard.plist (? 68cad67 0 - installed 2017-11-04) [Lookup]
[not loaded] com.apple.installer.cleanupinstaller.plist (? 1963bf56 0 - installed 2017-11-13)
[loaded] com.microsoft.office.licensingV2.helper.plist (Microsoft Corporation - installed 2015-08-15) [Lookup]
[loaded] com.teamviewer.Helper.plist (TeamViewer GmbH - installed 2017-08-24) [Lookup]
[not loaded] com.teamviewer.teamviewer_service.plist (TeamViewer GmbH - installed 2017-11-03) [Lookup]
User Launch Agents:ⓘ
[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2017-11-13) [Lookup]
[loaded] com.skype.skype.shareagent.plist (Skype Communications S.a.r.l - installed 2017-11-12) [Lookup]
[running] com.spotify.webhelper.plist (Spotify - installed 2017-11-21) [Lookup]
User Login Items:ⓘ
iTunesHelper Application (Apple, Inc. - installed 2017-11-03)
(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
SpeechSynthesisServer Application
(/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)
Internet Plug-ins:ⓘ
QuickTime Plugin: 7.7.3 (installed 2017-10-25)
3rd Party Preference Panes:ⓘ
None
Time Machine:ⓘ
Time Machine not configured!
Top Processes by CPU:ⓘ
5% com.apple.WebKit.WebContent
4% WindowServer
3% Safari
2% kernel_task
1% hidd
Top Processes by Memory:ⓘ
988 MB kernel_task
279 MB Spotify Helper
221 MB com.apple.WebKit.WebContent
216 MB com.apple.WebKit.WebContent
205 MB Microsoft Excel
Top Processes by Network Use:ⓘ
Input Output Process name
78 MB 495 KB Spotify
187 KB 8 KB mDNSResponder
21 KB 29 KB com.apple.WebKit.Networking
17 KB 14 KB apsd
7 KB 2 KB cloudd
Top Processes by Energy Use:ⓘ
61.72 com.apple.WebKit.WebContent
21.34 WindowServer
17.96 com.apple.WebKit.Networking
5.98 Safari
Virtual Memory Information:ⓘ
10.09 GB Available RAM
5.76 GB Free RAM
5.91 GB Used RAM
4.33 GB Cached files
0 B Swap Used
Software installs (last 30 days):ⓘ
Microsoft Office 2016 for Mac: (installed 2017-11-03)
TeamViewer: 12.0.82953 (installed 2017-11-03)
Free Ringtone Maker: 1.7.1 (installed 2017-11-11)
Install information may not be complete.
Diagnostics Events (last 3 days for minor events):ⓘ
2017-11-21 22:28:26 Microsoft AutoUpdate.app Crash [Open]
2017-11-20 15:11:44 com.apple.WebKit.WebContent High CPU use [Open] [Details]
2017-11-15 17:12:25 Kernel Panic [Open] [Details]
3rd Party Kernel Extensions:
com.vmware.kext.vmnet 0666.50.85
com.vmware.kext.vmx86 0666.50.85
com.vmware.kext.vmci 90.8.1
com.vmware.kext.vmioplug.17.1.2 17.1.2