caching

问题 I was following this StackOverflow answer (https://stackoverflow.com/a/58021389/11268971) to get my Docker build image process to use a cache directory with package wheels for pip install . However, when I switched from (suggested in the SO answer) # syntax = docker/dockerfile:experimental FROM python:3.7 RUN --mount=type=cache,target=/root/.cache/pip pip install -r requirements.txt to # syntax = docker/dockerfile:experimental FROM python:3.7 RUN --mount=type=cache,target=/home/my_username

问题 I'm trying to understand the cache misses recorded by perf. I have a minimal program: int main(void) { return 0; } If I compile this: gcc -std=c99 -W -Wall -Werror -O3 -S -o test.S test.c I get an expectedly small program: .file "test.c" .section .text.startup,"ax",@progbits .p2align 4,,15 .globl main .type main, @function main: .LFB0: .cfi_startproc xorl %eax, %eax ret .cfi_endproc .LFE0: .size main, .-main .ident "GCC: (Debian 4.7.2-5) 4.7.2" .section .note.GNU-stack,"",@progbits With only

问题 Angular production build is not generating unique hashes in my project. Below are the build logs screenshot Not able to reproduce this issue in new angular cli project, seems there is some issue in my project. I am using angular - 6.0.3 Below is the angular.json { "$schema": "./node_modules/@angular/cli/lib/config/schema.json", "version": 1, "newProjectRoot": "projects", "projects": { "exampleProject": { "root": "", "sourceRoot": "src", "projectType": "application", "prefix": "app",

问题 I am using the WebBrowser control to display a Login page for user to signing to their account and then application will get contacts from that account. However, the problem is if user select option "Keep signing" from browser, browser will cache that account name and next login with different account, it will return previous cached account name. This lead to application will get wrong account name. You guys know how to force WebBrowser to clear all cache before proceed to prevent this

问题 I am very experienced developer but very new to mobile app dev. I am using Kotlin, Android Studio & Amplify with a DynamoDB APi. When I add data via the AWS website it shows on the device. When I delete it doesn't reflect unless I uninstall/reinstall. I assume this is some sort of basic cache management/sync issue but like I said I am very new. I have tried removing context.cacheDir but the deleted record persists. Any help would be appreciated. Here is some more info. As I say I am

问题 I am very experienced developer but very new to mobile app dev. I am using Kotlin, Android Studio & Amplify with a DynamoDB APi. When I add data via the AWS website it shows on the device. When I delete it doesn't reflect unless I uninstall/reinstall. I assume this is some sort of basic cache management/sync issue but like I said I am very new. I have tried removing context.cacheDir but the deleted record persists. Any help would be appreciated. Here is some more info. As I say I am

问题 I'm interested how people deal with updating images/css/js with regards to the the browser cache. It's obviously good to use mod_expires and have a future expiry etc - but how can you then update those files if you don't want to rename the file all the time? Does anyone have any cool tricks with a version number which will not risk the browser (or proxy) not wanting to cache the file, but will still guarantee the user will see the new version if it's updated? 回答1: The general way of doing

问题 I'm interested how people deal with updating images/css/js with regards to the the browser cache. It's obviously good to use mod_expires and have a future expiry etc - but how can you then update those files if you don't want to rename the file all the time? Does anyone have any cool tricks with a version number which will not risk the browser (or proxy) not wanting to cache the file, but will still guarantee the user will see the new version if it's updated? 回答1: The general way of doing

问题 In my web app, I have a large collection of thumbnails, the user is able to select a thumbnail and client side recrop from the original image to recreate a new thumbnail. That's fine, in my app, I just set the newly created image instantly to the image source, without reloading it from the server, and next to this, the new image is uploaded to the server. This is to ensure a very responsive feeling. The problem is that when to user refreshes the page, he sees the cached old version of the

问题 I use shareReplay to call only once (like a cache) a webservice to retrieve some informations : In my service : getProfile(): Observable<Customer> { return this.callWS().pipe(shareReplay(1)); } In multiple components : this.myService.getProfile().subscribe(customer => { console.log('customer informations has been retrieved from WS :', customer); }); Now I want to add a method to force refresh the informations (bypass shareReplay only once). I tried with storing my observable in a variable,