In case it might help finding the root cause of the increased CPU load, I am attaching the Conky configuration file I use to this message.
conky.config = { alignment = 'top_right', default_graph_height = 30, default_color = 'white', double_buffer = true, use_xft = true, font = 'DejaVu Sans Condensed:style=Bold:size=9', gap_y = 0, maximum_width = 300, minimum_height = 1024, minimum_width = 300, own_window = true, own_window_type = 'desktop', own_window_hints = 'undecorated,below,sticky,skip_taskbar,skip_pager', short_units = true, update_interval = 1.0, show_graph_scale = true, }
conky.text = [[ ${time %A %d %B}${alignr}${time %R} Uptime ${alignr} $uptime Mises-à-jour disponibles ${alignr} ${texeci 1800 echo $(apt list --upgradable 2>/dev/null | tail +2 | wc -l)} En attente de redémarrage ${alignr} ${execi 1800 test -e /var/run/reboot-required && echo oui || echo non} ${font DejaVu Sans Condensed:style=Bold:size=12}Réseau ${hr}${font} ${if_up enp3s0}${downspeedgraph enp3s0 30,145 FFC5B1 982700 65000000 -t}${alignr}${upspeedgraph enp3s0 30,145 B1C5FF 002798 65000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${offset -75}${downspeedf enp3s0} K/s ⬇${font} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -19}${alignc}${offset 85}${upspeedf enp3s0} K/s ⬆${font} ${endif} ${font DejaVu Sans Condensed:style=Bold:size=12}CPU ${hr}${font} $alignr ${execpi 60 show_cpu_temperature conky} ${cpugraph cpu0 40,298 C5FFC5 279827 -t} ${top name 1} $alignr ${top cpu 1}% ${top name 2} $alignr ${top cpu 2}% ${top name 3} $alignr ${top cpu 3}% ${font DejaVu Sans Condensed:style=Bold:size=12}RAM ${hr}${font} ${alignr}$mem / $memmax ${memgraph 40,298 FFFFB1 989800 -t} ${top_mem name 1} $alignr ${top_mem mem_res 1} ${top_mem name 2} $alignr ${top_mem mem_res 2} ${top_mem name 3} $alignr ${top_mem mem_res 3} ${font DejaVu Sans Condensed:style=Bold:size=12}Disques ${hr}${font} / ${diskiograph /dev/disk/by-id/ata-Samsung_SSD_860_PRO_256GB_S42VNGAK102577V 30,298 FFB1B1 980000 260000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-Samsung_SSD_860_PRO_256GB_S42VNGAK102577V}/s${font} /srv ${diskiograph /dev/disk/by-id/ata-TOSHIBA_HDWD110_58PM6KGFS 30,298 FFFFB1 989800 190000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-TOSHIBA_HDWD110_58PM6KGFS}/s${font} /home/jeux ${diskiograph /dev/disk/by-id/ata-WDC_WD120EFBX-68B0EN0_5QKWL5UB 30,298 B1FFB1 009800 200000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-WDC_WD120EFBX-68B0EN0_5QKWL5UB}/s${font} /home/media ${diskiograph /dev/disk/by-id/ata-WDC_WD80EFAX-68KNBN0_VGHBTWAG 30,298 B1FFFF 009898 190000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-WDC_WD80EFAX-68KNBN0_VGHBTWAG}/s${font} /home/musique ${diskiograph /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N6CPH7RD 30,298 B1B1FF 000098 150000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N6CPH7RD}/s${font} /home/vrac ${diskiograph /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K4UYYUJ1 30,298 FFB1FF 980098 170000000 -t} ${font DejaVu Sans Condensed:style=Bold:size=12}${voffset -34}${alignc}${diskio /dev/disk/by-id/ata-WDC_WD40EFRX-68N32N0_WD-WCC7K4UYYUJ1}/s${font} ${if_running mpd}${if_mpd_playing} ${font DejaVu Sans Condensed:style=Bold:size=12}Musique ${hr}${font} ${alignc}$mpd_title ${alignc}$mpd_album ${alignc}$mpd_artist ]]
OpenPGP_signature
Description: OpenPGP digital signature