Speed up ubuntu

sudo sublime-text /etc/fstab


# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noatime,noexec,nosuid 0       0
# / was on /dev/sda6 during installation
UUID=3ae1a70e-2ac6-46c1-a135-b981eeb76221 /               ext4    errors=remount-ro,noatime 0       1
# swap was on /dev/sda5 during installation
UUID=bf903d3c-d9cf-4807-a9bd-e71c329275aa 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/anacron                tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs    /var/spool/cron                   tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
#tmpfs    /var/spool/cups                   tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
#tmpfs    /var/spool/mail                   tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs    /var/spool/plymouth               tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs    /var/spool/rsyslog                tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
#tmpfs    /var/lib/php/sessions             tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0
tmpfs    /tmp                              tmpfs defaults,auto,noatime,nodiratime,nodev,nosuid,async 0 0

sudo sublime-text/etc/sysctl.conf

vm.swappiness=10
vm.vfs_cache_pressure=50
fs.inotify.max_user_watches =2097152

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:~$