I am using a Windows 7, i7-2600k with 32GB of ram & an M500 SSD as my host, and a Windows 8.1 guest in a default configurations (detailed below)
With the previous technology preview I was resuming Windows 8.1 in approximately 23-24 seconds with full debugging. I was considering submitting a report on this, since it seemed fairly slow.
With the July technology preview the very first resume took 1 minute and 30 seconds, and all subsequent resume took around 11 - 16 seconds with full debugging.
It seemed that if I resume then suspend a guest, all subsequent resumes become much faster, starting at 16 seconds, and 11 on the subsequent one.
These are some nice performance increases, even without having enabled the "Experimental performance tuning for VM suspend and resume"
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Host System Information
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Time of this report: 7/8/2014, 19:37:22
Machine name: NEUROMANCER
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.140303-2144)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 11/01/12 09:54:59 Ver: 36.02
Processor: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz (8 CPUs), ~3.4GHz
Memory: 32768MB RAM
Available OS Memory: 32736MB RAM
Page File: 5004MB used, 60463MB available
Windows Dir: H:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: 120 DPI (125 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
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Guest Configuration
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.encoding = "windows-1252"
config.version = "8"
virtualHW.version = "11"
scsi0.present = "TRUE"
scsi0.virtualDev = "lsisas1068"
sata0.present = "TRUE"
memsize = "4096"
mem.hotadd = "TRUE"
scsi0:0.present = "TRUE"
scsi0:0.fileName = "Windows 8 x64.vmdk"
sata0:1.present = "TRUE"
sata0:1.fileName = "H:\Users\REMOVED\Desktop\Holding\9600.17050.WINBLUE_REFRESH.140317-1640_X64FRE_ENTERPRISE_EVAL_EN-US-IR3_CENA_X64FREE_EN-US_DV9.ISO"
sata0:1.deviceType = "cdrom-image"
ethernet0.present = "TRUE"
ethernet0.connectionType = "nat"
ethernet0.virtualDev = "e1000e"
ethernet0.wakeOnPcktRcv = "FALSE"
ethernet0.addressType = "generated"
usb.present = "TRUE"
ehci.present = "TRUE"
ehci.pciSlotNumber = "34"
usb_xhci.present = "TRUE"
sound.present = "TRUE"
sound.virtualDev = "hdaudio"
sound.fileName = "-1"
sound.autodetect = "TRUE"
mks.enable3d = "TRUE"
serial0.present = "TRUE"
serial0.fileType = "thinprint"
pciBridge0.present = "TRUE"
pciBridge4.present = "TRUE"
pciBridge4.virtualDev = "pcieRootPort"
pciBridge4.functions = "8"
pciBridge5.present = "TRUE"
pciBridge5.virtualDev = "pcieRootPort"
pciBridge5.functions = "8"
pciBridge6.present = "TRUE"
pciBridge6.virtualDev = "pcieRootPort"
pciBridge6.functions = "8"
pciBridge7.present = "TRUE"
pciBridge7.virtualDev = "pcieRootPort"
pciBridge7.functions = "8"
vmci0.present = "TRUE"
hpet0.present = "TRUE"
usb.vbluetooth.startConnected = "TRUE"
touchscreen.vusb.present = "TRUE"
sensor.accelerometer = "pass-through"
sensor.ambientLight = "pass-through"
sensor.compass = "pass-through"
sensor.gyrometer = "pass-through"
sensor.inclinometer = "pass-through"
sensor.location = "pass-through"
sensor.orientation = "pass-through"
displayName = "Windows 8 x64"
guestOS = "windows8-64"
nvram = "Windows 8 x64.nvram"
virtualHW.productCompatibility = "hosted"
powerType.powerOff = "soft"
powerType.powerOn = "soft"
powerType.suspend = "soft"
powerType.reset = "soft"
extendedConfigFile = "Windows 8 x64.vmxf"
floppy0.present = "FALSE"
checkpoint.vmState = "Windows 8 x64-69a59d11.vmss"
scsi0.pciSlotNumber = "160"
sata0.pciSlotNumber = "36"
ethernet0.generatedAddress = "00:0c:29:3c:b1:76"
ethernet0.pciSlotNumber = "192"
usb.pciSlotNumber = "32"
usb_xhci.pciSlotNumber = "224"
sound.pciSlotNumber = "33"
vmci0.id = "1614590326"
vmci0.pciSlotNumber = "35"
tools.syncTime = "TRUE"
uuid.location = "56 4d 5e 93 6b 55 f5 e8-5a 20 8e 14 60 3c b1 76"
uuid.bios = "56 4d 5e 93 6b 55 f5 e8-5a 20 8e 14 60 3c b1 76"
migrate.hostlog = "H:\Users\REMOVED\Documents\Virtual Machines\Windows 8 x64\Windows 8 x64-69a59d11.hlog"
replay.supported = "FALSE"
gui.lastPoweredViewMode = "fullscreen"
unity.wasCapable = "TRUE"
svga.guestBackedPrimaryAware = "TRUE"
toolsInstallManager.updateCounter = "4"
replay.filename = ""
scsi0:0.redo = ""
pciBridge0.pciSlotNumber = "17"
pciBridge4.pciSlotNumber = "21"
pciBridge5.pciSlotNumber = "22"
pciBridge6.pciSlotNumber = "23"
pciBridge7.pciSlotNumber = "24"
scsi0.sasWWID = "50 05 05 63 6b 55 f5 e0"
ethernet0.generatedAddressOffset = "0"
usb_xhci:4.present = "TRUE"
usb_xhci:6.present = "TRUE"
usb_xhci:7.present = "TRUE"
vm.genid = "7206900761373387880"
vm.genidX = "-5658337313321901508"
tools.remindInstall = "FALSE"
monitor.phys_bits_used = "42"
vmotion.checkpointFBSize = "33554432"
vmotion.checkpointSVGAPrimarySize = "33554432"
cleanShutdown = "TRUE"
softPowerOff = "FALSE"
usb_xhci:4.deviceType = "hid"
usb_xhci:4.port = "4"
usb_xhci:4.parent = "-1"
usb_xhci:6.speed = "2"
usb_xhci:6.deviceType = "hub"
usb_xhci:6.port = "6"
usb_xhci:6.parent = "-1"
usb_xhci:7.speed = "4"
usb_xhci:7.deviceType = "hub"
usb_xhci:7.port = "7"
usb_xhci:7.parent = "-1"