Hi Jyri, would you mind sharing a dmesg with us, or at least any sort of general info in what environment you're experiencing these kinds of problems?
Of course running a current chrome on an old iMac won't yield the same performance as running chrome on a laptop fresh out of the box, but the OS hardly makes any difference there... What I've noticed is that on machines with Skylake and similarly newer graphics hardware, you'll have to disable hardware acceleration in your browsers. This is due to the fact that the inteldrm driver does not yet support such devices, which yields non-working HW acceleration. With that disabled, on my i5 box (dmesg after the signature), I can watch 4k videos on youtube just fine using Chrome. I haven't tried LinkedIn, but Xing seems to work very nicely as well, as do Twitter, all sorts of JS-heavy Medium-style sites and so on. FWIW, performance was also good (not 100% up to Linux, but definitely not as bad as you describe) on my T400 (Low-end Core2Duo, 6GB RAM) and on my R60i (even lower end Core2Duo, but 8GB of RAM). -- Gregor OpenBSD 6.1-current (GENERIC.MP) #20: Wed Apr 19 20:57:30 CEST 2017 g...@sputnik.unobtanium.de:/usr/obj/sys/arch/amd64/compile/GENERIC.MP real mem = 17078013952 (16286MB) avail mem = 16554639360 (15787MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x87ed7000 (44 entries) bios0: vendor American Megatrends Inc. version "5.11" date 08/29/2016 bios0: Notebook N24_25JU acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP APIC FPDT FIDT MCFG HPET SSDT SSDT DBGP DBG2 SSDT UEFI SSDT BGRT DMAR TPM2 ASF! acpi0: wakeup devices PEGP(S4) PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) PXSX(S4) RP17(S4) PXSX(S4) RP18(S4) PXSX(S4) RP19(S4) PXSX(S4) RP20(S4) PXSX(S4) RP01(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2400.00 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu0: 256KB 64b/line 8-way L2 cache cpu0: TSC frequency 2400000000 Hz cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 24MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2400.00 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 1 (application processor) cpu2: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2400.00 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 1, core 0, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, 2400.00 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 1, core 1, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255 acpihpet0 at acpi0: 23999999 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (PEG0) acpiprt2 at acpi0: bus -1 (PEG1) acpiprt3 at acpi0: bus -1 (PEG2) acpiprt4 at acpi0: bus -1 (RP17) acpiprt5 at acpi0: bus -1 (RP18) acpiprt6 at acpi0: bus -1 (RP19) acpiprt7 at acpi0: bus -1 (RP20) acpiprt8 at acpi0: bus 1 (RP01) acpiprt9 at acpi0: bus 2 (RP02) acpiprt10 at acpi0: bus -1 (RP03) acpiprt11 at acpi0: bus -1 (RP04) acpiprt12 at acpi0: bus -1 (RP05) acpiprt13 at acpi0: bus -1 (RP06) acpiprt14 at acpi0: bus -1 (RP07) acpiprt15 at acpi0: bus -1 (RP08) acpiprt16 at acpi0: bus -1 (RP09) acpiprt17 at acpi0: bus -1 (RP10) acpiprt18 at acpi0: bus -1 (RP11) acpiprt19 at acpi0: bus -1 (RP12) acpiprt20 at acpi0: bus -1 (RP13) acpiprt21 at acpi0: bus -1 (RP14) acpiprt22 at acpi0: bus -1 (RP15) acpiprt23 at acpi0: bus -1 (RP16) acpiec0 at acpi0 acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu1 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu2 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpicpu3 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), C1(1000@1 mwait.1), PSS acpipwrres0 at acpi0: PG00, resource for PEG0 acpipwrres1 at acpi0: PG01, resource for PEG1 acpipwrres2 at acpi0: PG02, resource for PEG2 acpitz0 at acpi0: critical temperature is 120 degC "INT3F0D" at acpi0 not configured "MSFT0001" at acpi0 not configured "SYN1218" at acpi0 not configured "INT33A1" at acpi0 not configured "MSFT0101" at acpi0 not configured "PNPC000" at acpi0 not configured acpibtn0 at acpi0: PWRB acpibtn1 at acpi0: SLPB acpibtn2 at acpi0: LID0 acpiac0 at acpi0: AC unit online acpibat0 at acpi0: BAT0 model "BAT" serial 0001 type LION oem "Notebook" "PNP0C14" at acpi0 not configured "INT340E" at acpi0 not configured acpivideo0 at acpi0: GFX0 acpivout0 at acpivideo0: DD1F cpu0: Enhanced SpeedStep 2400 MHz: speeds: 2301, 2300, 2200, 2100, 2000, 1800, 1700, 1500, 1400, 1300, 1100, 1000, 800, 700, 500, 400 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Core 6G Host" rev 0x08 "Intel HD Graphics 520" rev 0x07 at pci0 dev 2 function 0 not configured xhci0 at pci0 dev 20 function 0 "Intel 100 Series xHCI" rev 0x21: msi usb0 at xhci0: USB revision 3.0 uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 addr 1 "Intel 100 Series MEI" rev 0x21 at pci0 dev 22 function 0 not configured ahci0 at pci0 dev 23 function 0 "Intel 100 Series AHCI" rev 0x21: msi, AHCI 1.3.1 ahci0: port 0: 6.0Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, CT240BX200SSD1, MU02> SCSI3 0/direct fixed naa.500a0751f01c9d7a sd0: 228936MB, 512 bytes/sector, 468862128 sectors, thin ppb0 at pci0 dev 28 function 0 "Intel 100 Series PCIE" rev 0xf1: msi pci1 at ppb0 bus 1 rtsx0 at pci1 dev 0 function 0 "Realtek RTL8411B Card Reader" rev 0x01: msi sdmmc0 at rtsx0: 4-bit re0 at pci1 dev 0 function 1 "Realtek 8168" rev 0x12: RTL8411B (0x5c80), msi, address 80:fa:5b:33:76:b3 rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0 ppb1 at pci0 dev 28 function 1 "Intel 100 Series PCIE" rev 0xf1: msi pci2 at ppb1 bus 2 iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless AC 8260" rev 0x3a, msi pcib0 at pci0 dev 31 function 0 "Intel 100 Series LPC" rev 0x21 "Intel 100 Series PMC" rev 0x21 at pci0 dev 31 function 2 not configured azalia0 at pci0 dev 31 function 3 "Intel 100 Series HD Audio" rev 0x21: msi azalia0: codecs: Realtek ALC269, Intel/0x2809, using Realtek ALC269 audio0 at azalia0 ichiic0 at pci0 dev 31 function 4 "Intel 100 Series SMBus" rev 0x21: apic 2 int 16 iic0 at ichiic0 isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard pms0 at pckbc0 (aux slot) wsmouse0 at pms0 mux 0 pms0: Synaptics touchpad, firmware 8.2 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 vmm0 at mainbus0: VMX/EPT efifb0 at mainbus0: 1920x1080, 32bpp wsdisplay0 at efifb0 mux 1: console (std, vt100 emulation), using wskbd0 wsdisplay0: screen 1-5 added (std, vt100 emulation) uhidev0 at uhub0 port 1 configuration 1 interface 0 "Elan PS/2+USB Mouse" rev 1.10/22.90 addr 2 uhidev0: iclass 3/1 ums0 at uhidev0: 3 buttons, Z dir wsmouse1 at ums0 mux 0 ugen0 at uhub0 port 5 "Intel Bluetooth" rev 2.00/0.01 addr 3 uvideo0 at uhub0 port 6 configuration 1 interface 0 "Generic Chicony USB 2.0 Camera" rev 2.00/32.07 addr 4 video0 at uvideo0 uhidev1 at uhub0 port 7 configuration 1 interface 0 "CHESEN PS2 to USB Converter" rev 1.10/0.10 addr 5 uhidev1: iclass 3/1 ukbd0 at uhidev1: 8 variable keys, 6 key codes wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev2 at uhub0 port 7 configuration 1 interface 1 "CHESEN PS2 to USB Converter" rev 1.10/0.10 addr 5 uhidev2: iclass 3/1, 3 report ids ums1 at uhidev2 reportid 1: 5 buttons, Z dir wsmouse2 at ums1 mux 0 uhid0 at uhidev2 reportid 2: input=1, output=0, feature=0 uhid1 at uhidev2 reportid 3: input=3, output=0, feature=0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed sd1: 228896MB, 512 bytes/sector, 468779647 sectors root on sd1a (927460f40d363126.a) swap on sd1b dump on sd1b iwm0: hw rev 0x200, fw ver 16.242414.0, address e4:a4:71:e1:45:79 WARNING: R/W mount of /usr/obj denied. Filesystem is not clean - run fsck iwm0: could not initiate scan iwm0: could not initiate scan WARNING: R/W mount of /usr/obj denied. Filesystem is not clean - run fsck WARNING: R/W mount of /usr/obj denied. Filesystem is not clean - run fsck