High CPU Usage in React-Native
I'm working to reduce the CPU load on an RN app. I've built the app to a device, in release, and trimmed the console logs from the project. Even after doing this the app is still around 33% CPU usage on a mostly blank screen.
The interesting part is that occasionally, after about 6 minutes, the CPU frees up and drops to 3-4%. I suspect that a really long loop has completed but am unable to find it.
I've run the app in Xcode's Instruments, it's only on iOS atm, and found some interesting things. From the looks of it, it's gotten into a long chain of [CALayer renderInContext] which is coming from UVVideoRecorder. I'm not familiar with UVVideoRecorder and would love to hear any thoughts people might have.
Call Stack + Threads
xcode performance react-native cpu-usage
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
add a comment |
I'm working to reduce the CPU load on an RN app. I've built the app to a device, in release, and trimmed the console logs from the project. Even after doing this the app is still around 33% CPU usage on a mostly blank screen.
The interesting part is that occasionally, after about 6 minutes, the CPU frees up and drops to 3-4%. I suspect that a really long loop has completed but am unable to find it.
I've run the app in Xcode's Instruments, it's only on iOS atm, and found some interesting things. From the looks of it, it's gotten into a long chain of [CALayer renderInContext] which is coming from UVVideoRecorder. I'm not familiar with UVVideoRecorder and would love to hear any thoughts people might have.
Call Stack + Threads
xcode performance react-native cpu-usage
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
add a comment |
I'm working to reduce the CPU load on an RN app. I've built the app to a device, in release, and trimmed the console logs from the project. Even after doing this the app is still around 33% CPU usage on a mostly blank screen.
The interesting part is that occasionally, after about 6 minutes, the CPU frees up and drops to 3-4%. I suspect that a really long loop has completed but am unable to find it.
I've run the app in Xcode's Instruments, it's only on iOS atm, and found some interesting things. From the looks of it, it's gotten into a long chain of [CALayer renderInContext] which is coming from UVVideoRecorder. I'm not familiar with UVVideoRecorder and would love to hear any thoughts people might have.
Call Stack + Threads
xcode performance react-native cpu-usage
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
I'm working to reduce the CPU load on an RN app. I've built the app to a device, in release, and trimmed the console logs from the project. Even after doing this the app is still around 33% CPU usage on a mostly blank screen.
The interesting part is that occasionally, after about 6 minutes, the CPU frees up and drops to 3-4%. I suspect that a really long loop has completed but am unable to find it.
I've run the app in Xcode's Instruments, it's only on iOS atm, and found some interesting things. From the looks of it, it's gotten into a long chain of [CALayer renderInContext] which is coming from UVVideoRecorder. I'm not familiar with UVVideoRecorder and would love to hear any thoughts people might have.
Call Stack + Threads
xcode performance react-native cpu-usage
xcode performance react-native cpu-usage
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
asked Nov 14 '18 at 19:11
James DunayJames Dunay
1,39773260
1,39773260
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53307231%2fhigh-cpu-usage-in-react-native%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53307231%2fhigh-cpu-usage-in-react-native%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
