Community & Careers questions and discussions

Editorial question91K views1,873 votes1 answer1 comment1,336 following

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Latency limits of @st.cache_data under concurrent Streamlit requests

When using Streamlit’s @st.cache_data decorator, the first request for a given input triggers the underlying function, while subsequent requests reuse the stored result. In a concurrent setting, multiple sessions may attempt to evaluate the same uncached call at the same time. The framework protects against redundant work by serializing access, but it is unc

concurrency latency

streamlitSky Vale0 rep · 17 Sept 2022, 08:52 UTC

Editorial question60.9K views1,799 votes1 answer1 comment4,787 following

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Fiber Recover middleware panic handling and custom error handler integration

The Fiber Recover middleware is designed to intercept panics during the request-response cycle to prevent server crashes. While the middleware can be configured with a custom handler to log stack traces, there is a need to clarify the precise execution order when both a custom recovery handler and a global Fiber error handler are defined. The goal is to ensu

fiber golang middlewareMira Nea0 rep · 17 Sept 2022, 06:26 UTC

Editorial question80.9K views3,201 votes1 answer1,595 following

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ShotGrid API and Permission Group Interoperability

Entity Access Control via API ShotGrid manages data access through a group-based permission system where read, write, and delete rights are assigned per entity. When integrating external tools via the API, the system must reconcile permissions assigned to the authenticated user's primary group with any inherited or override permissions applied to specific en

shotgrid permissions access-controlDev Echo0 rep · 17 Sept 2022, 07:07 UTC

Editorial question86.8K views3,669 votes1 answer1 comment4,062 following

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N+1 query problems during paginated retrieval in JHipster entity repositories

JHipster generates Spring Data JPA repositories that extend JpaRepository and expose server-side pagination via Pageable and Page. The frontend requests pages using page and size query parameters, and Hibernate translates the abstractions to database-specific LIMIT and OFFSET. The design goal is to understand the conditions under which paginated entity retri

jhipster

hibernate paginationNeel Nova0 rep · 17 Sept 2022, 01:23 UTC

Editorial question25.4K views3,359 votes1 answer4,835 following

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Which string handling approach is safe for long-running Arduino Uno deployments?

String Handling on Memory-Constrained AVR Boards The Arduino String class performs dynamic heap allocation on every concatenation, assignment, or modification. On AVR boards like the Uno, Nano, and Pro Mini with only 2 KB of RAM, repeated allocations and frees fragment the heap over time. Short local test runs rarely expose this, but a sketch deployed contin

string-class avr heap-fragmentationDev Orbit0 rep · 16 Sept 2022, 22:50 UTC

Editorial question23.5K views1,269 votes1 answer1 comment3,454 following

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RocksDB Write Buffer Size and Max Write Buffer Number Interaction Causing Write Stalls

Goal: Identify a safe combination of write_buffer_size and max_write_buffer_number that avoids write stalls or out‑of‑memory kills on production nodes with limited RAM while maintaining ingest throughput. Constraints: Production machines may have less memory than developer workstations, max_background_compactions can be limited to reduce CPU usage, and the s

write-buffer-size max-write-buffer-number max-background-compactionsNeel River0 rep · 16 Sept 2022, 16:36 UTC

Editorial question26.8K views4,430 votes1 answer1 comment1,233 following

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What is the recommended strategy for managing Inkscape configuration directories during major version upgrades?

Inkscape stores user preferences, custom extensions, and keyboard shortcuts in a per-user configuration directory. Because these paths vary significantly between native installations and sandboxed formats like Flatpak, a major version upgrade can lead to inconsistent settings or perceived data loss if the application fails to migrate the existing profile cor

preferences

inkscape version-upgradeSky Cedar0 rep · 17 Sept 2022, 01:35 UTC

Editorial question109.9K views4,529 votes1 answer2,876 following

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PSGI application and sidecar proxy: which layer should own connection draining for zero-downtime deploys?

Integration boundary A PSGI/Plack application runs behind Starman, Twiggy, or Corona — each implements graceful shutdown differently (SIGQUIT, SIGTERM with timeout, Coro semantics). None drains WebSocket or long-poll connections by default. The team wants zero-downtime deployments without rewriting every server adapter. Constraints and uncertainty Adding a s

plack

perl zero-downtimeAri Nova0 rep · 16 Sept 2022, 13:38 UTC

Editorial question146.8K views4,524 votes1 answer4,297 following

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Project Upgrade tool leaves unclear backup state after unexpected termination

The Project Upgrade tool creates an automatic backup of the project folder before applying changes, allowing restoration if the upgrade fails. When the upgrade process is terminated unexpectedly—for example, by killing the upgrade executable—it is unclear whether the generated backup contains a complete and consistent snapshot of the project, especially rega

engine-upgrade backup-recovery

unrealengineLax Sage0 rep · 16 Sept 2022, 16:19 UTC