Hi Mario,
What is the application that you are working on?
I am working on JN-AN-1223 and I have tried with JN-AN-1216 and I face the same issue.
You have a lot of factors that are affecting your compiling process, is your CPU doing other routines? Do you have enabled your antivirus that is checking all the write and read process?
I am using windows 10, and I have not installed any other antivirus software, I am using the default windows defender.
I am working with the JN-AN-1229, I cleaned and build the coordinator process and it takes 45s 372ms

The task manager shows the following, but remember Beyond Studio is based on the Kepler release of the open-source Eclipse IDE, and as you know Eclipse takes a lot RAM, so it explains in my case the 144MB.

when I am building this is what I am getting in the task manager. CPU usage keeps changing ...

and for a build without clean it takes around 6 mins. I am using the demo code without any alterations.
11:42:16 **** Incremental Build of configuration ZigbeeNodeControlBridge_EEPROM_JN5168 for project ZigbeeNodeControlBridge ****
make TRACE=1 PDM_BUILD_TYPE=_EEPROM JENNIC_CHIP=JN5168 VERSION=66455124 all
JENNIC_MAC is Mini MAC shim
Building trace version ...
Compiling /c/NXP/bstudio_nxp/workspace2/ZigbeeNodeControlBridge/Source/ZigbeeNodeControlBridge/app_Znc_cmds.c ...
/c/NXP/bstudio_nxp/sdk/Tools/ba-elf-ba2-r36379/bin/ba-elf-gcc -c -o app_Znc_cmds.o -DUART_BAUD_RATE=115200 -DVERSION=66455124 -DUART_DEBUGGING=1 -DDEBUG_UART=DBG_E_UART_1 -DDEBUG_ZCL -DDEBUG_ZB_CONTROLBRIDGE_TASK -DTRACE_APP -DDEBUG_AGE_CHILDREN -DAPP_APS_ACK -DJN516x=5160 -DJN5168=5168 -DJENNIC_CHIP_NAME=_JN5168 -DJENNIC_CHIP_FAMILY_NAME=_JN516x -march=ba2 -mcpu=jn51xx -mredzone-size=4 -mbranch-cost=3 -fomit-frame-pointer -Os -fshort-enums -Wall -Wpacked -Wcast-align -fdata-sections -ffunction-sections -flto -DWATCHDOG_ENABLED -DJENNIC_HW_BBC_RXINCCA=1 -DJENNIC_HW_BBC_DMA=1 -DJENNIC_HW_BBC_ISA=0 -DJENNIC_SW_EXTERNAL_FLASH=0 -DJN516X_DMA_UART_BACKWARDS_COMPATIBLE_API=1 -DUART_BACKWARDS_COMPATIBLE_API=1 -DJENNIC_CHIP=JN5168 -DJENNIC_CHIP_JN5168 -DJENNIC_CHIP_FAMILY=JN516x -DJENNIC_CHIP_FAMILY_JN516x -DJENNIC_STACK_ZLLHA -DJENNIC_MAC_MiniMacShim -Wall -Wunreachable-code -DEMBEDDED -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Platform/Common/Include -DJENNIC_PCB=DEVKIT2 -DJENNIC_PCB_DEVKIT2 -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Platform/DK2/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Common/Include -DPDM_USER_SUPPLIED_ID -DPDM_EEPROM -DDBG_ENABLE -DZPS_APL_OPT_SINGLE_INSTANCE -DOTA_NO_CERTIFICATE -DPLME_SAP -I/c/NXP/bstudio_nxp/workspace2/ZigbeeNodeControlBridge/Source/ZigbeeNodeControlBridge -I/c/NXP/bstudio_nxp/workspace2/ZigbeeNodeControlBridge/Source/ZigbeeNodeControlBridge/.. -I/c/NXP/bstudio_nxp/workspace2/ZigbeeNodeControlBridge/Source/Common -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/JennicLogo/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Utilities/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Random/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/NXPLogo/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Utilities/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Patch/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/OVLY/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Aes/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Utilities/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/AppApi/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MiniMac/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MMAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/HardwareApi/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Aes/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/DBG/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MicroSpecific/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MiniMAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/MMAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/TimerServer/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Random/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSMAC_Mini/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/OS/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/PWRM/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSTSV/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/AES_SW/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/PDUM/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSAPL/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Random/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/PDM_EEPROM/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/DBG/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSZLL/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSNWK/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/PDM/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSMAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZPSNWK/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Source -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/General/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/General/Source -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/Lighting/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/MeasurementAndSensing/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/EnergyAtHome/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/SE/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/GreenPower/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/HVAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/OTA/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/SmartEnergy/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/IAS/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/HA/Common/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/HA/Generic/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/HA/EnergyAtHome/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/HA/HVAC/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/HA/IAS/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Clusters/LightLink/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/ZLL/Include -I/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Profiles/GP/Include /c/NXP/bstudio_nxp/workspace2/ZigbeeNodeControlBridge/Source/ZigbeeNodeControlBridge/app_Znc_cmds.c -MD -MF app_Znc_cmds.d -MP
Linking ZigbeeNodeControlBridge_JN5168.elf ...
/c/NXP/bstudio_nxp/sdk/Tools/ba-elf-ba2-r36379/bin/ba-elf-gcc -Wl,--cref,--gc-sections -Wl,-u_AppColdStart -Wl,-u_AppWarmStart -march=ba2 -mcpu=jn51xx -mredzone-size=4 -mbranch-cost=3 -fomit-frame-pointer -Os -fshort-enums -flto -nostartfiles -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Chip/JN5168/Build -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Chip/JN5168/Library -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Platform/DK2/Library -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/Library -Wl,--gc-sections -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Components/ZCL/Build -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Stack/ZBPro/Build -L/c/NXP/bstudio_nxp/sdk/JN-SW-4168/Stack/ZLLHA/Build -Wl,--defsym=__stack_size=6500 -Wl,--defsym,__minimum_heap_size=2000 -TAppBuildZBPro.ld -o ZigbeeNodeControlBridge_JN5168.elf -Wl,--start-group os_gen.o os_irq.o os_irq_alignment.o os_irq_buserror.o os_irq_illegalinstruction.o os_irq_stackoverflowexception.o os_irq_unimplementedmodule.o pdum_gen.o zps_gen.o app_Znc_cmds.o app_Znc_zcltask.o app_ZncParser_task.o app_ZncCommission_task.o app_start.o SerialLink.o uart.o NumToString.o app_timer_driver.o ecb_decrypt.o appZpsBeaconHandler.o appZdpExtraction.o pdum_apdu.o app_scenes.o app_ota_server.o app_poll_control_commands_handler.o app_zbp_utilities.o AgeChildren.o Alarms.o AlarmsClientCommands.o AlarmsCommandHandler.o AlarmsServerCommands.o AlarmsTableManager.o AnalogInputBasic.o AnalogOutputBasic.o Basic.o BasicClientCommands.o BasicCommandHandler.o BinaryInputBasic.o BinaryOutputBasic.o Commissioning.o DeviceTemperatureConfiguration.o Diagnostics.o DoorLock.o DoorLockCommandHandler.o DoorLockCommands.o ElectricalMeasurement.o Groups.o GroupsClientCommands.o GroupsCommandHandler.o GroupsServerCommands.o GroupsTableManager.o Identify.o IdentifyClientCommands.o IdentifyCommandHandler.o IdentifyServerCommands.o LevelControl.o LevelControlClientCommands.o LevelControlCommandHandler.o MultistateInputBasic.o MultistateOutputBasic.o OOSC.o OnOff.o OnOffCommandHandler.o OnOffCommands.o PollControl.o PollControlClientCommands.o PollControlCommandHandler.o PollControlServerCommands.o PowerConfiguration.o Scenes.o ScenesClientCommands.o ScenesClusterManagement.o ScenesCommandHandler.o ScenesServerCommands.o ScenesTableManager.o TC.o Time.o FlowMeasurement.o IlluminanceLevelSensing.o IlluminanceMeasurement.o OccupancySensing.o PressureMeasurement.o RelativeHumidityMeasurement.o TemperatureMeasurement.o zll_CommissionCmdHandler.o zll_UtilityCmdHandler.o zll_commission.o zll_utility.o colour_light.o colour_remote.o colour_scene_remote.o colour_temperature_light.o commission_endpoint.o control_bridge.o dimmable_light.o dimmable_plug.o extended_colour_light.o non_colour_remote.o non_colour_scene_remote.o on_off_light.o on_off_plug.o on_off_sensor.o zll.o BallastConfiguration.o ColourControl.o ColourControlClientCommands.o ColourControlCommandHandler.o ColourControlConversions.o ApplianceControl.o ApplianceControlClientCommands.o ApplianceControlCommandHandler.o ApplianceControlServerCommands.o ApplianceEventsAndAlerts.o ApplianceEventsAndAlertsClientCommands.o ApplianceEventsAndAlertsCommandHandler.o ApplianceEventsAndAlertsServerCommands.o ApplianceIdentification.o ApplianceStatistics.o ApplianceStatisticsClientCommands.o ApplianceStatisticsCommandHandler.o ApplianceStatisticsServerCommands.o PowerProfile.o PowerProfileClientCommands.o PowerProfileCommandHandler.o PowerProfileServerCommands.o home_gateway.o white_goods.o FanControl.o Thermostat.o ThermostatCommandHandler.o ThermostatCommands.o ThermostatUIConfig.o temperature_sensor.o thermostat_device.o DRLC.o DRLCCommandCanceAlllLoadControlEvents.o DRLCCommandCancelLoadControlEvent.o DRLCCommandGetScheduledEvents.o DRLCCommandHandler.o DRLCCommandLoadControlEvent.o DRLCCommandReportEventStatus.o DRLCCustomCommandResponsesClient.o DRLCCustomCommandResponsesServer.o DRLCEffectiveTime.o DRLCScheduler.o DRLCTableManagerNoMutex.o DRLCTableManagerServer.o DRLCUserEventOptInOut.o Price.o PriceBlockPeriodTableManager.o PriceCalorificValueTableManager.o PriceCommandGetBlockPeriod.o PriceCommandGetCalorificValue.o PriceCommandGetConversionFactor.o PriceCommandGetCurrentPrice.o PriceCommandGetScheduledPrices.o PriceCommandPriceAck.o PriceCommandPublishBlockPeriod.o PriceCommandPublishBlockPeriodReceive.o PriceCommandPublishCalorificValue.o PriceCommandPublishCalorificValueReceive.o PriceCommandPublishConversionFactor.o PriceCommandPublishConversionFactorReceive.o PriceCommandPublishPrice.o PriceCommandPublishPriceReceive.o PriceConversionFactorTableManager.o PriceCustomCommandHandler.o PriceCustomCommandResponses.o PriceScheduler.o PriceServerAttributeManager.o PriceTableManager.o SimpleMetering.o SimpleMeteringCommandHandler.o SimpleMetering_SendRequest.o IASACE.o IASACEClientCommands.o IASACECommandHandler.o IASACEServerCommands.o IASWD.o IASWDCommandHandler.o IASWDCommands.o IASZone.o IASZoneCommandHandler.o IASZoneCommands.o ancillary_control_equipment.o control_and_indicating_equipment.o warning_device.o zone.o dlist.o zcl.o zcl_CustomCommandReceive.o zcl_CustomCommandSend.o zcl_PDUbufferReadWrite.o zcl_PDUbufferReadWriteString.o zcl_WriteAttributesRequestHandle.o zcl_WriteAttributesRequestSend.o zcl_WriteAttributesResponseHandle.o zcl_attribute.o zcl_buffer.o zcl_clusterCommand.o zcl_command.o zcl_configureReportingCommandHandle.o zcl_configureReportingCommandSend.o zcl_configureReportingResponseHandle.o zcl_defaultResponse.o zcl_discoverAttributesExtendedRequestHandle.o zcl_discoverAttributesExtendedRequestSend.o zcl_discoverAttributesExtendedResponseHandle.o zcl_discoverAttributesRequestHandle.o zcl_discoverAttributesRequestSend.o zcl_discoverAttributesResponseHandle.o zcl_discoverCommandsRequestHandle.o zcl_discoverCommandsRequestSend.o zcl_discoverCommandsResponseHandle.o zcl_event.o zcl_heap.o zcl_library_options.o zcl_readAttributesRequestHandle.o zcl_readAttributesRequestSend.o zcl_readAttributesResponseHandle.o zcl_readReportingConfigurationCommandHandle.o zcl_readReportingConfigurationCommandSend.o zcl_readReportingConfigurationResponseHandle.o zcl_reportManager.o zcl_reportMaths.o zcl_reportScheduler.o zcl_reportStringHandling.o zcl_reportStructure.o zcl_search.o zcl_timer.o zcl_transmit.o OTA.o OTA_ClientUpgradeManager.o OTA_CustomCommandHandler.o OTA_CustomReceiveCommands.o OTA_ServerUpgradeManager.o OTA_client.o OTA_common.o OTA_server.o -lZPSMAC_Mini_JN516x -lOS_JN516x -lPWRM_JN516x -lZPSTSV_JN516x -lAES_SW_JN516x -lPDUM_JN516x -lZPSAPL_JN516x -lRandom_JN516x -lPDM_EEPROM_JN516x -lDBG_JN516x -lZPSZLL_JN516x -lZPSNWK_JN516x -lMiniMac_JN516x -lMiniMacShim_JN516x -lMMAC_JN516x -lAes_JN516x -lHardwareApi_JN516x -lMicroSpecific_JN516x -lBoot_JN516x -lBoardLib_JN516x -lm -Wl,--end-group -Wl,-Map,ZigbeeNodeControlBridge_JN5168.map
/c/NXP/bstudio_nxp/sdk/Tools/ba-elf-ba2-r36379/bin/ba-elf-size ZigbeeNodeControlBridge_JN5168.elf
text data bss dec hex filename
183834 2584 30509 216927 34f5f ZigbeeNodeControlBridge_JN5168.elf
Generating binary ...
/c/NXP/bstudio_nxp/sdk/Tools/ba-elf-ba2-r36379/bin/ba-elf-objcopy -j .version -j .bir -j .flashheader -j .vsr_table -j .vsr_handlers -j .ro_mac_address -j .ro_ota_header -j .ro_se_customData -j .rodata -j .text -j .data -j .bss -j .heap -j .stack -S -O binary ZigbeeNodeControlBridge_JN5168.elf ZigbeeNodeControlBridge_JN5168.bin
cp ZigbeeNodeControlBridge_JN5168.bin ../bin
11:48:11 Build Finished (took 5m:54s.416ms)