It's terrible. I have no idea what the cause of the issue is.
EtreCheck:
EtreCheck version: 3.4.2 (436)
Report generated 2017-08-14 18:02:28
Download EtreCheck from https://etrecheck.com
Runtime: 1:52
Performance: Excellent
Click the [Lookup] links for more information from Apple Support Communities.
Click the [Details] links for more information about that line.
Problem: Beachballing
Hardware Information: ⓘ
MacBook Pro (Retina, 13-inch, Early 2015)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro12,1
1 2.7 GHz Intel Core i5 (i5-5257U) CPU: 2-core
8 GB RAM Not upgradeable
BANK 0/DIMM0
4 GB DDR3 1867 MHz ok
BANK 1/DIMM0
4 GB DDR3 1867 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Battery: Health = Normal - Cycle count = 544
iCloud Quota: 34.56 GB available
Video Information: ⓘ
Intel Iris Graphics 6100 - VRAM: 1536 MB
Color LCD 2560 x 1600
Disk Information: ⓘ
APPLE SSD SM0256G disk0: (251 GB) (Solid State - TRIM: Yes)
[Show SMART report]
EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB
(disk0s2) <not mounted> [CoreStorage Container]: 250.14 GB
Recovery HD (disk0s3 - Journaled HFS+) <not mounted> [Recovery]: 650 MB
USB Information: ⓘ
USB30Bus
Broadcom Corp. Bluetooth USB Host Controller
Logitech USB Receiver
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Virtual disks: ⓘ
MacOS (disk1 - Journaled HFS+) / [Startup]: 249.78 GB (216.69 GB free)
Encrypted AES-XTS Unlocked
Physical disk: disk0s2 250.14 GB Online
System Software: ⓘ
macOS Sierra 10.12.6 (16G29) - Time since boot: less than an hour
Gatekeeper: ⓘ
Mac App Store and identified developers
Kernel Extensions: ⓘ
/Library/Extensions
[loaded] com.malwarebytes.mbam.rtprotection (3.0 - SDK 10.12) [Lookup]
System Launch Agents: ⓘ
[not loaded] 7 Apple tasks
[loaded] 178 Apple tasks
[running] 97 Apple tasks
System Launch Daemons: ⓘ
[not loaded] 42 Apple tasks
[loaded] 173 Apple tasks
[running] 101 Apple tasks
Launch Agents: ⓘ
[running] com.malwarebytes.mbam.frontend.agent.plist (? 631295be 680057a5 - installed 2017-08-14) [Lookup]
Launch Daemons: ⓘ
[running] com.malwarebytes.HelperTool.plist (Malwarebytes Corporation - installed 2017-07-28) [Lookup]
[running] com.malwarebytes.mbam.rtprotection.daemon.plist (? 31419c10 e3f423ee - installed 2017-08-14) [Lookup]
[running] com.malwarebytes.mbam.settings.daemon.plist (? a40d558f d0b9e521 - installed 2017-08-14) [Lookup]
User Launch Agents: ⓘ
[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2017-07-28) [Lookup]
Internet Plug-ins: ⓘ
QuickTime Plugin: 7.7.3 (installed 2017-07-15)
3rd Party Preference Panes: ⓘ
None
Time Machine: ⓘ
Time Machine not configured!
Top Processes by CPU: ⓘ
2% kernel_task
1% RTProtectionDaemon
0% WindowServer
0% fontd
0% com.apple.WebKit.WebContent
Top Processes by Memory: ⓘ
628 MB kernel_task
408 MB com.apple.WebKit.WebContent
326 MB com.apple.WebKit.WebContent
178 MB Safari
149 MB Finder
Top Processes by Network Use: ⓘ
Input Output Process name
3 MB 241 KB com.apple.WebKit.Networking
90 KB 8 KB mDNSResponder
23 KB 18 KB apsd
7 KB 1 KB netbiosd
4 KB 3 KB com.apple.geod
Top Processes by Energy Use: ⓘ
0.64 opendirectoryd
0.44 RTProtectionDaemon
0.40 WindowServer
0.24 cloudd
Virtual Memory Information: ⓘ
3.86 GB Available RAM
62 MB Free RAM
4.14 GB Used RAM
3.80 GB Cached files
32 MB Swap Used
Software installs: ⓘ
Airmail: 3.3.2 (installed 2017-07-28)
Logitech Options: (installed 2017-07-28)
Slack: 2.6.2 (installed 2017-07-28)
Airmail: 3.3.2 (installed 2017-07-28)
Logitech Options: (installed 2017-07-29)
USB Overdrive: (installed 2017-07-29)
ColorSnapper2: 1.5.0 (installed 2017-08-03)
Slack: 2.7.0 (installed 2017-08-14)
Malwarebytes for Mac: (installed 2017-08-14)
Install information may not be complete.
Diagnostics Information: ⓘ
2017-08-14 17:32:52 Last shutdown cause: 3 - Hard shutdown
EtreCheck:
EtreCheck version: 3.4.2 (436)
Report generated 2017-08-14 18:02:28
Download EtreCheck from https://etrecheck.com
Runtime: 1:52
Performance: Excellent
Click the [Lookup] links for more information from Apple Support Communities.
Click the [Details] links for more information about that line.
Problem: Beachballing
Hardware Information: ⓘ
MacBook Pro (Retina, 13-inch, Early 2015)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro12,1
1 2.7 GHz Intel Core i5 (i5-5257U) CPU: 2-core
8 GB RAM Not upgradeable
BANK 0/DIMM0
4 GB DDR3 1867 MHz ok
BANK 1/DIMM0
4 GB DDR3 1867 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Battery: Health = Normal - Cycle count = 544
iCloud Quota: 34.56 GB available
Video Information: ⓘ
Intel Iris Graphics 6100 - VRAM: 1536 MB
Color LCD 2560 x 1600
Disk Information: ⓘ
APPLE SSD SM0256G disk0: (251 GB) (Solid State - TRIM: Yes)
[Show SMART report]
EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB
(disk0s2) <not mounted> [CoreStorage Container]: 250.14 GB
Recovery HD (disk0s3 - Journaled HFS+) <not mounted> [Recovery]: 650 MB
USB Information: ⓘ
USB30Bus
Broadcom Corp. Bluetooth USB Host Controller
Logitech USB Receiver
Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus
Virtual disks: ⓘ
MacOS (disk1 - Journaled HFS+) / [Startup]: 249.78 GB (216.69 GB free)
Encrypted AES-XTS Unlocked
Physical disk: disk0s2 250.14 GB Online
System Software: ⓘ
macOS Sierra 10.12.6 (16G29) - Time since boot: less than an hour
Gatekeeper: ⓘ
Mac App Store and identified developers
Kernel Extensions: ⓘ
/Library/Extensions
[loaded] com.malwarebytes.mbam.rtprotection (3.0 - SDK 10.12) [Lookup]
System Launch Agents: ⓘ
[not loaded] 7 Apple tasks
[loaded] 178 Apple tasks
[running] 97 Apple tasks
System Launch Daemons: ⓘ
[not loaded] 42 Apple tasks
[loaded] 173 Apple tasks
[running] 101 Apple tasks
Launch Agents: ⓘ
[running] com.malwarebytes.mbam.frontend.agent.plist (? 631295be 680057a5 - installed 2017-08-14) [Lookup]
Launch Daemons: ⓘ
[running] com.malwarebytes.HelperTool.plist (Malwarebytes Corporation - installed 2017-07-28) [Lookup]
[running] com.malwarebytes.mbam.rtprotection.daemon.plist (? 31419c10 e3f423ee - installed 2017-08-14) [Lookup]
[running] com.malwarebytes.mbam.settings.daemon.plist (? a40d558f d0b9e521 - installed 2017-08-14) [Lookup]
User Launch Agents: ⓘ
[loaded] com.google.keystone.agent.plist (Google, Inc. - installed 2017-07-28) [Lookup]
Internet Plug-ins: ⓘ
QuickTime Plugin: 7.7.3 (installed 2017-07-15)
3rd Party Preference Panes: ⓘ
None
Time Machine: ⓘ
Time Machine not configured!
Top Processes by CPU: ⓘ
2% kernel_task
1% RTProtectionDaemon
0% WindowServer
0% fontd
0% com.apple.WebKit.WebContent
Top Processes by Memory: ⓘ
628 MB kernel_task
408 MB com.apple.WebKit.WebContent
326 MB com.apple.WebKit.WebContent
178 MB Safari
149 MB Finder
Top Processes by Network Use: ⓘ
Input Output Process name
3 MB 241 KB com.apple.WebKit.Networking
90 KB 8 KB mDNSResponder
23 KB 18 KB apsd
7 KB 1 KB netbiosd
4 KB 3 KB com.apple.geod
Top Processes by Energy Use: ⓘ
0.64 opendirectoryd
0.44 RTProtectionDaemon
0.40 WindowServer
0.24 cloudd
Virtual Memory Information: ⓘ
3.86 GB Available RAM
62 MB Free RAM
4.14 GB Used RAM
3.80 GB Cached files
32 MB Swap Used
Software installs: ⓘ
Airmail: 3.3.2 (installed 2017-07-28)
Logitech Options: (installed 2017-07-28)
Slack: 2.6.2 (installed 2017-07-28)
Airmail: 3.3.2 (installed 2017-07-28)
Logitech Options: (installed 2017-07-29)
USB Overdrive: (installed 2017-07-29)
ColorSnapper2: 1.5.0 (installed 2017-08-03)
Slack: 2.7.0 (installed 2017-08-14)
Malwarebytes for Mac: (installed 2017-08-14)
Install information may not be complete.
Diagnostics Information: ⓘ
2017-08-14 17:32:52 Last shutdown cause: 3 - Hard shutdown