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View Code? Open in Web Editor NEWUsing the ZBar C-library in WebAssembly to build a browser-based multi-barcode detector
Using the ZBar C-library in WebAssembly to build a browser-based multi-barcode detector
since there is no a.out.js it giving an error "index.html:26 Uncaught ReferenceError: Module is not defined"
It is very nice for scanning using web assembly and very helpful repository, thanks for sharing.
However, I came across following scenario, please read,
when running demo sample application from iPad, it keeps adding memory and at certain point page gets crashed. It clearly gets noticed in iPad, however in Chrome it shows memory getting increased and after some memory limit, chrome also shows crash behavior.
please suggest or improve the memory management.
Executed everything exactly in the same manner when a qr code is shown in front of the camera Getting the following error:
Uncaught abort("this function has been removed - you should use UTF8ToString(ptr, maxBytesToRead) instead!"). Build with -s ASSERTIONS=1 for more info.
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:192
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask @ zone.js:496
ZoneTask.invoke @ zone.js:485
timer @ zone.js:2054
setInterval (async)
scheduleTask @ zone.js:2075
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:407
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask @ zone.js:255
scheduleMacroTaskWithCurrentZone @ zone.js:1114
(anonymous) @ zone.js:2090
proto.(anonymous function) @ zone.js:1394
navigator.mediaDevices.getUserMedia.then @ list:86
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:388
push../node_modules/zone.js/dist/zone.js.Zone.run @ zone.js:138
(anonymous) @ zone.js:872
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
drainMicroTaskQueue @ zone.js:595
Promise.then (async)
scheduleMicroTask @ zone.js:578
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:410
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMicroTask @ zone.js:252
scheduleResolveOrReject @ zone.js:862
resolvePromise @ zone.js:808
(anonymous) @ zone.js:724
Promise.then (async)
(anonymous) @ zone.js:1042
ZoneAwarePromise @ zone.js:891
Ctor.then @ zone.js:1041
Module.onRuntimeInitialized @ list:73
doRun @ a.out.js:1
run @ a.out.js:1
runCaller @ a.out.js:1
removeRunDependency @ a.out.js:1
receiveInstance @ a.out.js:1
receiveInstantiatedSource @ a.out.js:1
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:388
push../node_modules/zone.js/dist/zone.js.Zone.run @ zone.js:138
(anonymous) @ zone.js:872
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
drainMicroTaskQueue @ zone.js:595
Promise.then (async)
scheduleMicroTask @ zone.js:578
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:410
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMicroTask @ zone.js:252
scheduleResolveOrReject @ zone.js:862
resolvePromise @ zone.js:808
(anonymous) @ zone.js:724
Promise.then (async)
(anonymous) @ zone.js:1042
ZoneAwarePromise @ zone.js:891
Ctor.then @ zone.js:1041
createWasm @ a.out.js:1
Module.asm @ a.out.js:1
(anonymous) @ a.out.js:1
After Some time getting this error
Uncaught abort("OOM"). Build with -s ASSERTIONS=1 for more info.
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:192
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask @ zone.js:496
ZoneTask.invoke @ zone.js:485
timer @ zone.js:2054
setInterval (async)
scheduleTask @ zone.js:2075
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:407
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask @ zone.js:255
scheduleMacroTaskWithCurrentZone @ zone.js:1114
(anonymous) @ zone.js:2090
proto.(anonymous function) @ zone.js:1394
navigator.mediaDevices.getUserMedia.then @ list:86
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:388
push../node_modules/zone.js/dist/zone.js.Zone.run @ zone.js:138
(anonymous) @ zone.js:872
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
drainMicroTaskQueue @ zone.js:595
Promise.then (async)
scheduleMicroTask @ zone.js:578
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:410
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMicroTask @ zone.js:252
scheduleResolveOrReject @ zone.js:862
resolvePromise @ zone.js:808
(anonymous) @ zone.js:724
Promise.then (async)
(anonymous) @ zone.js:1042
ZoneAwarePromise @ zone.js:891
Ctor.then @ zone.js:1041
Module.onRuntimeInitialized @ list:73
doRun @ a.out.js:1
run @ a.out.js:1
runCaller @ a.out.js:1
removeRunDependency @ a.out.js:1
receiveInstance @ a.out.js:1
receiveInstantiatedSource @ a.out.js:1
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke @ zone.js:388
push../node_modules/zone.js/dist/zone.js.Zone.run @ zone.js:138
(anonymous) @ zone.js:872
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
drainMicroTaskQueue @ zone.js:595
Promise.then (async)
scheduleMicroTask @ zone.js:578
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:410
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMicroTask @ zone.js:252
scheduleResolveOrReject @ zone.js:862
resolvePromise @ zone.js:808
(anonymous) @ zone.js:724
Promise.then (async)
(anonymous) @ zone.js:1042
ZoneAwarePromise @ zone.js:891
Ctor.then @ zone.js:1041
createWasm @ a.out.js:1
Module.asm @ a.out.js:1
(anonymous) @ a.out.js:1
The demo works perfectly fine in the laptop browser but in mobile phone browser its lagging too much. I tried optimizing by using service workers but couldn't see much improvement.
Are there any ways to improve the performance in the mobile browser?
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