As the landscape of computing evolves, so does the definition of
performance. In recent years, there has been a shift in the way that people
have come to perceive what truly defines top computing performance. Whereas
speed was previously seen as the be-all and end-all of computing capabilities,
the question of stability and smoothness has steadily moved into the spotlight
too. Only by delivering consistent and fluid operations across all types of
applications and scenarios is it possible for users to enjoy a real sense of
fluency and efficiency. This is a principle that OPPO has embraced and
exemplified through a decade of development with ColorOS.
Over the past ten years, OPPO has been working to perfect the balance
between rapid responsiveness, rock-steady stability, and silky smoothness with
each iteration of ColorOS. By constantly finding new ways to blend the best
hardware with the most comprehensive and in-depth optimization of the
underlying software, we have elevated the concept of smoothness, and even
entire perceptions of performance on Android smartphones, to ensure seamless
user experiences in any situation.
‘Visible’ and ‘invisible’
smoothness
One of OPPO’s first breakthroughs in delivering the ultimate smooth
user experience came with the release of UI First in early 2020. By
prioritizing active applications, UI First prevents background applications
from over consuming system resources causing the drag down towards the overall
performance. The result is a significant reduction in noticeable lag and the
enhancement of what we call “visible smoothness.”
However, as computing resources were directed into supporting active
applications, apps running in the background were being starved of resources
and effectively killed. This in turn caused delays when switching between those
apps. Meanwhile, The widespread adoption of 5G increased the consumption of
high-data media, entering the so-called “rich media” era, has placed additional
processing pressure on the system. To address this 'invisible’ smoothness
issues, OPPO began optimizing ColorOS for better temperature control, stable
battery life, and a more continuous and uninterrupted experience.
Our large team of chip engineers has conducted enormous volumes of
in-depth analysis into the computing power distribution of each task on
different processing units on the chip. We then established mathematical models
to predict performance and power consumption and optimize the computing power
distribution for each task to guarantee a better battery life without
sacrificing performance capabilities.
At the same time, we utilized improved memory compression technology to
save more memory space for users, and breakpoint reading technology to ensure a
more continuous and uninterrupted experience. Now, on ColorOS 14, the system’s
latest release, upgraded technologies in the OS’s Trinity Engine make it
possible for the phone to run as many as 28 applications on the back end for up
to 72 hours.
These innovations enable ColorOS to make the most of any given
smartphone hardware and deliver the best results when it comes to traditional
stats used for measuring smooth performance, such as app launch speeds, game
frame rates, and more. Thanks to hardware scheduling capabilities like these,
ColorOS now consistently ranks among the top performers in major industry
benchmarks.
More human, more consistent
As OPPO’s engineers continued to push the boundaries of smoothness and
ColorOS received increasing recognition from tech authorities with its top
benchmark scores, the team gradually came to realize that high performance and
ultimate speed do not necessarily translate into a more comfortable and
“smoother” user experience in all scenarios.
“As a software developer, my instinct was to always make everything as
fast as possible. It’s easy for us to fall into the habit of pushing to deliver
the best results from a numbers perspective,” said Hansheng Hong, Director of
Software Technology Planning, OPPO.
“For example, we are capable of doubling the current speed of our
animations, but when the user actually sees them, they appear too abrupt.
Realizing this has completely changed my point of view and taught me that it's
pointless to compete on data alone.”
The brand-new Aquamorphic Effects in ColorOS 14 showcase how this
insight has been put into practice. Contrary to what might be expected, the
animations of these new effects have actually been optimized by reducing the
speed from 380 milliseconds to a more user-friendly 750 milliseconds. By
refining the dynamic effect logic in ColorOS 14, every interaction has been
made more intuitive and fluid.
This is just one example of how OPPO has
introduced Human Factors Analysis into the design of the OS. This is a
discipline that specializes in the study of human interaction with machines and
environments in order to make machines or systems more adaptable to human
physiological and psychological characteristics. Through Human Factor Analysis,
Hong learned that the human eye can only detect changes at intervals of about
100-150 milliseconds or more. If changes occur in less than 100 milliseconds,
most people simply cannot tell the difference. This means that, even if the
hardware is capable of doing so, there is no reason to engineer system response
times as low as 50 milliseconds.
At the same time, Hong also became aware of a concept in psychology
known as ‘negative bias’, in which people tend to remember only specific
negative moments, even if the overall experience is positive. For example, if
you only encounter a single delay once in every one hundred times you start an
application, you are still more likely to remember this one negative moment and
perceive the overall experience as being negative on the whole. The
implications of this are that it is stability and consistency, rather than
occasional bursts of speed, that determine how smooth the user experience is
perceived.
In order to provide this level of consistently smooth experience
throughout the operating life of our mobile devices, OPPO has introduced Human
Factors Analysis into multiple aspects of ColorOS. One of the decisions that
came from this was to set the response speed of application launches to 135
milliseconds. Through millions of repeated tests, we also identified and solved
extremely low-likelihood consistency issues in areas like touch feedback,
software concurrency, display delay, and more. The result is a consistent
response time in the 100-150 millisecond range for all aspects of the UI with
no perceivable fluctuations.
Embracing the possibilities
of AI-generated content
Looking towards the future of smartphone and operating system
experiences, the ColorOS team is mindful that the integration of AIGC
(AI-generated content) is likely to place a high demand on mobile system
resources, covering everything from memory and processing capabilities to
battery life. Right now, OPPO is exploring and experimenting in related
capabilities, for instance, on how to optimize memory use and power management
techniques to cope with such high demands.
ColorOS 14's Trinity Engine exemplifies this forward-thinking approach
with its advanced solutions for optimizing system smoothness and stability
through fine-tuned management and scheduling of computing resources, memory,
and storage at the microarchitecture instruction level.
The upgraded Trinity Engine contains three core technologies: ROM
Vitalization, RAM Vitalization, and CPU Vitalization. ROM Vitalization frees up
more memory space by compressing app data and merging duplicated files to
address performance degradation issues caused by memory filling up over the
long term. RAM Vitalization works by reconstructing Android's underlying RAM
mechanism and employing specialized techniques to accelerate app launch speeds
and improve the level of fluidity when switching between apps. Finally, CPU
Vitalization uses a sophisticated computing power model that can precisely
schedule power resources while determining the best balance between performance
and power consumption.
In addition to the Trinity Engine, OPPO’s Instantaneous Bandwidth
Technology set to be included in the forthcoming ColorOS 14 update is another
example of how the memory management system has been rewritten to improve
operating smoothness. OPPO developed the technology more than 18 months ahead
of the release of the Google Linux open-source design by modifying more than 50
thousand lines of code in the original kernel. With Instantaneous Bandwidth
Technology, memory access performance is dynamically adjusted according to
smartphone usage, enabling up to 16-times faster speeds (i.e. from 4K to 64K
during the transfer process from DDRAM to CPU). As the data transfer bandwidth
increases, the loss of read data falls significantly, which in turn helps to
improve memory utilization and reduce latency while using the phone.
By further deepening the synergy between hardware and software, ColorOS
14 brings users an ultra-smooth experience across all scenarios that’s
guaranteed to stay smooth for up to 48 months. Drawing on the insights of over
600 million active monthly ColorOS users, OPPO continues to use its unique
position to identify global user trends and unmet needs in order to further
optimize the smooth and stable experience on OPPO devices.
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