With the release of the Windows 10 May 2020 Update (version
2004), Microsoft made improvements to the ‘Segment Heap’
feature in the OS and added support for desktop (Win32)
programs like web browsers.
Segment Heap was also introduced for Chromium open source
project and Google was planning to use this feature to fix
the notoriously RAM-hungry Chrome browser. However, Google team
have now decided to disable new Segment Heap implementation in
the browser and they’ll now enable ‘ParitionAlloc-Everywhere’.
The paritionAlloc-everywhere feature is in development since August and
it now seems to be making steady progress. According to one
document, PartitionAlloc-Everywhere has its own benefits:
reduced memory usage, allocators in Chrome and improved
This will Google Chrome to manage memory more efficiently
resulting in lower RAM usage and it will also reduce the
potential security issues at the same time.
The security of Google Chrome will be improved using
‘MiraclePtr’, which requires the PartitionAlloc.
The document where Google has highlighted the upcoming changes
is currently private and it is hard to predict when Chrome will
get necessary changes in Chrome, but more details could be
shared in the first half of 2021.
Google to fix Chrome crashes
In addition to memory usage improvements, Google says
tests have shown that Windows 10’s TerminateProcess feature
could lead to fewer browser crashes if it used for more process
Google noted that exiting a process cleanly is difficult and
expensive, especially with complex software.
Chrome has been gradually moving towards using TerminateProcess
for more process types. The company has proposed a new change
that will enable TerminateProcess in headless browsers, which
could lead to fewer browser crashes.
“This will avoid some utility-process crashes on Windows. I
think that applying this policy to all headless process types
is a worthwhile experiment. TerminateProcess has helped a lot
in many process types already,” explained Bruce Dawson, a
Google software developer.
Both Microsoft and Google have agreed that reducing RAM usage
in web browsers is important, but improvements like Segment
Heap and ParitionAlloc will vary depending on your
It’s worth noting that Microsoft has already enabled “modern
heap implementation” to cut down memory usage and Edge team is
working on another feature called ‘Sleeping
Tabs‘ comes with additional improvements for memory