Community & Careers questions and discussions

Editorial question131.9K views1,896 votes1 answer4,814 following

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Memory overhead and performance trade‑offs when using matfile to access large .mat variables versus full load on limited RAM

Data Restoration Memory Constraints \p\nMATLAB's .mat file format supports version 7.3 with HDF5 storage, enabling variables larger than 2 GB via the -v7.3 flag. The load function restores all variables into the workspace, requiring contiguous memory for the entire dataset, while the matfile object permits indexed access to subsets without loading the full c

hdf5

matlab memory-managementNeel Vale0 rep · 13 Oct 2022, 08:59 UTC

Editorial question126.1K views3,698 votes1 answer3,170 following

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ngrok ↔ local dev server: WebSocket upgrade reliability under load

Goal Determine whether ngrok’s handling of WebSocket upgrades is the source of frame loss or latency spikes when the local development server receives more than 200 concurrent connections. Constraints & Uncertainty ngrok 3.x injects a TLS termination layer adding 5–15 ms per request. Its core runs a single‑threaded event loop, which may become a CPU bott

websocket local-server

ngrokRin Moss0 rep · 12 Oct 2022, 10:29 UTC

Editorial question35.5K views1,523 votes1 answer3,668 following

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IE10 DOM-JavaScript circular reference retention diagnosis

IE10 Trident engine uses a COM-based implementation with a generational garbage collector. Documented behavior indicates DOM-JavaScript circular references can be retained longer than in modern browsers, particularly when attachEvent is used and closures capture DOM nodes. The supported feature set includes HTML5 video/audio, WebSockets, File API, CSS3 media

trident

ie10 memory-managementDev Byte0 rep · 12 Oct 2022, 08:35 UTC

Editorial question37.6K views656 votes1 answer3,795 following

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PostgreSQL connection error when DB_SSL_MODE is omitted in AdonisJS production

When developing an AdonisJS application locally with SQLite, the server starts and migrations run without any additional configuration. In production, switching the database driver to PostgreSQL by setting DB_CONNECTION=pg causes the Lucid ORM to throw a connection error during the first query or migration if DB_SSL_MODE is not explicitly defined. The goal i

ssl-configuration

adonisjs lucidKavi Sage0 rep · 12 Oct 2022, 00:51 UTC

Editorial question51.2K views4,281 votes1 answer1 comment4,059 following

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Server‑side date serialization vs client‑side timezone conversion in Next.js

Integration boundary: Server‑side date handling and client‑side timezone conversion in Next.js The goal is to present dates correctly for users whose preferred time zone is only known at runtime (e.g., from a profile or browser API) while keeping the UI consistent between server‑rendered HTML and the subsequent client hydration. Constraints: getStaticProps r

timezone

nextjs date-conversionSky Cedar0 rep · 10 Oct 2022, 22:01 UTC

Editorial question103.9K views4,871 votes1 answer1 comment3,920 following

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Unresolved Thread Pool Configuration in Ren'Py’s renpy.fetch

Ren'Py’s renpy.fetch API launches a new Python thread for each asset download, queuing requests before dispatching them to the operating system. The implementation relies on a single, internally defined thread pool whose size is hard‑coded and not exposed to the game developer. Because Python’s Global Interpreter Lock serializes bytecode execution, CPU‑bound

concurrency

renpy guilDev Nova0 rep · 10 Oct 2022, 20:05 UTC

Editorial question65.9K views1,013 votes1 answer1,669 following

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Liquibase changesets ↔ PostgreSQL: Pagination of large queries

Goal During a data‑migration Liquibase changesets often need to process millions of rows. The objective is to use a pagination strategy (LIMIT/OFFSET or cursor‑based) within a changeset so that each batch fits comfortably into a single transaction and does not lock the entire table. Constraints Liquibase’s <sql> and <sqlFile> tags accept raw SQL,

changeset pagination

liquibaseAri Maple0 rep · 10 Oct 2022, 12:53 UTC

Editorial question143.7K views3,999 votes1 answer605 following

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ORA-01017 on Test in the New/Select Database Connection dialog: SID vs service name and thin vs OCI for a credential-free XE check

Goal I want to validate a SQL Developer database integration without touching production credentials. My plan is to point the New/Select Database Connection dialog at a local Oracle XE instance with a throwaway low-privilege user and rely on the Test button, which performs a real login round-trip through the JDBC driver, to confirm reachability and authentic

ora-01017

sqldeveloper oracle-xeRin Finch0 rep · 09 Oct 2022, 02:44 UTC

Editorial question60.5K views3,705 votes1 answer4,088 following

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TRPCError UNAUTHORIZED during integration testing of context-dependent procedures

When designing integration tests for tRPC v10+ procedures, the goal is to verify failure paths—such as unauthorized access—without utilizing production credentials or a live authentication provider. The current implementation relies on a ctx object that is strictly typed. In a test harness, providing a mocked context that triggers a TRPCError with the UNAUTH

trpcerror

typescript integration-testingRin Nea0 rep · 09 Oct 2022, 04:20 UTC