If I install a firmware file My debain os geting very slow

I installed this firmware-realtek frimware file in my debian os for my wifi driver. If I uninstall this firmware-realtek . then my pc works very fast. If I install firmware-realtek again my pc works very slowly. sudo apt-get install firmware-realtek Reading package lists... Done Building dependency tree... Done Reading state information... Done Note, selecting 'firmware-realtek' instead of './firmware- realtek_20190114-2~deb9u1_all.deb' The following NEW packages will be installed: firmware-realtek 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/506 kB of archives. After this operation, 1,602 kB of additional disk space will be used. Get:1 /home/simba/Downloads/firmware-realtek_20190114-2~deb9u1_all.deb firmware-realtek all 20190114-2~deb9u1 [506 kB] Selecting previously unselected package firmware-realtek. (Reading database ... 136550 files and directories currently installed.) Preparing to unpack .../firmware-realtek_20190114-2~deb9u1_all.deb ... Unpacking firmware-realtek (20190114-2~deb9u1) ... Setting up firmware-realtek (20190114-2~deb9u1) ... update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools (0.140) ... update-initramfs: Generating /boot/initrd.img-5.10.0-16-amd64 W: Possible missing firmware /lib/firmware/rtl_nic/rtl8125b-2.fw for module r8169 W: Possible missing firmware /lib/firmware/rtl_nic/rtl8125a-3.fw for module r8169 W: Possible missing firmware /lib/firmware/rtl_nic/rtl8168fp-3.fw for module r8169 W: Possible missing firmware /lib/firmware/i915/skl_huc_2.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/skl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_huc_2.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cml_huc_4.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cml_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_huc_9.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_guc_33.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_huc_9.0.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/ehl_guc_33.0.4.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_35.2.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_huc_7.5.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_guc_35.2.0.bin for module i915 W: Possible missing firmware /lib/firmware/i915/bxt_dmc_ver1_07.bin for module i915 W: Possible missing firmware /lib/firmware/i915/skl_dmc_ver1_27.bin for module i915 W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_04.bin for module i915 W: Possible missing firmware /lib/firmware/i915/glk_dmc_ver1_04.bin for module i915 W: Possible missing firmware /lib/firmware/i915/cnl_dmc_ver1_07.bin for module i915 W: Possible missing firmware /lib/firmware/i915/icl_dmc_ver1_09.bin for module i915 W: Possible missing firmware /lib/firmware/i915/tgl_dmc_ver2_08.bin for module i915 W: Possible missing firmware /lib/firmware/i915/rkl_dmc_ver2_02.bin for module i915 How can I solve this problem ?