Speed up ubuntu

sudo sublime-text /etc/fstab

UUID=3aff8e7d-245a-464e-8eba-3300c78887e5 / ext4 defaults,noatime,discard 0 1
UUID=1AAE-3E55  /boot/efi       vfat    umask=0077      0       1
UUID=bfd812ac-938f-488f-a01d-28a47b16a793 none            swap    sw              0       0

tmpfs   /var/cache                      tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/lock                       tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/log                        tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/tmp                        tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/mail                       tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /run                            tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/spool                      tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /tmp                            tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /home/pedro/.cache              tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/lib/docker/tmpfs           tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs   /var/lib/systemd/timers         tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0

sudo sublime-text/etc/sysctl.conf

vm.swappiness=1
vm.vfs_cache_pressure=50
vm.dirty_background_ratio=10
vm.dirty_ratio=40
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 65536 16777216

After modifying the file should run
sudo sysctl -p --system

Firefox

Type about:config in firefox address bar and click I'll be careful,I promise!.Right click on blank area and create a new string value called ,set its value to

Type about:config into the address bar

 layers.acceleration.force-enabled -> true

 gfx.webrender.all -> all

Type browser.cache into the Filter field

Set browser.cache.memory.enable to true (double click it)

browser.sessionhistory.max_entries 50 -> 5

gfx.color_management.mode -> 1

gfx.color_management.rendering_intent -> -1 

browser.display.auto_quality_min_font_size -> 6 

browser.cache.disk.metadata_memory_limit -> 1024

browser.cache.disk.preload_chunk_count ->8

network.dnsCacheExpiration-> 86400

Get rid of application with high I/O usage

To move the cache in Firefox, in the browser type ‘about:config’,

right-click anywhere and select

New –> String,

browser.cache.disk.parent_directory

/tmp/firefox

for a super-fast memory cache

Close all Firefox tabs and windows, and then restart the browser


compact firefox DB's:

for f in ~/.mozilla/firefox/*/*.sqlite; do sqlite3 $f 'VACUUM;'; done

In firefox:
extensions.pocket.enabled;false

CROME

For chrome edit the icon lanch command:
default command: /opt/google/chrome/google-chrome %U

/usr/bin/google-chrome-stable %U --disk-cache-dir='/tmp/chrome/' --disk-cache-size=2147483647

pedro@pedro:~$ sudo dd if=/dev/zero of=/tmp/t.img bs=4G count=1 oflag=dsync
0+1 records in
0+1 records out
2147479552 bytes (2.1 GB, 2.0 GiB) copied, 5.72344 s, 375 MB/s
pedro@pedro:~$

#/after tmp as tmpfs
pedro@pedro:~$ sudo dd if=/dev/zero of=/tmp/t.img bs=4G count=1 oflag=dsync
[sudo] password for pedro: 
0+1 records in
0+1 records out
2147479552 bytes (2.1 GB, 2.0 GiB) copied, 1.02069 s, 2.1 GB/s
pedro@pedro:~$