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Editorial question148.2K views2,915 votes0 answers651 following

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Which approach minimizes cache misses when slicing large allocatable arrays?

Fortran provides powerful array slicing capabilities that allow developers to access subsets of large datasets using the start:end syntax. When working with large allocatable arrays, these slices can be used to create processing windows similar to pagination in data-driven applications. However, slicing often results in non-contiguous memory access patterns.

memory-management array-slicing performance-optimizationAri Atlas0 rep · 08 May 2025, 11:00 UTC

Editorial question141.8K views2,348 votes0 answers1,331 following

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shrink_to_fit may not reduce capacity: behavior across implementations

Goal Determine whether a call to std::vector::shrink_to_fit actually reduces the container’s capacity and releases memory, and under what circumstances the operation is honored by different standard library implementations. Constraints and Uncertainty The C++ standard defines shrink_to_fit as a non‑binding request: the implementation may or may not reduce ca

std shrink-to-fit vectorSky Byte0 rep · 07 May 2025, 14:19 UTC

Editorial question111.6K views3,019 votes0 answers660 following

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Does Photoshop's Neural Filter latency spike at a specific concurrent request threshold?

Adobe Photoshop's Neural Filters rely on Adobe Sensei cloud infrastructure, where each filter request incurs round‑trip latency that grows with server load. Observations indicate latency remains between 200 ms and 800 ms while concurrent request volume stays below roughly 10 requests per second, but begins to exceed 2 seconds once volume rises above 20–30 re

neural-filters latency

photoshopAri Sage0 rep · 06 May 2025, 21:44 UTC

Editorial question110.7K views1,016 votes0 answers1,160 following

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Socket.IO Room‑Scoped Alerts Using Volatile Emits and Acknowledgment Timeouts

Goal Configure Socket.IO so that alerts are sent only to clients in a specific room, use the volatile flag to skip delivery when a client is not ready, and attach an acknowledgment callback with a timeout to detect missed deliveries and avoid repeated noisy notifications. Constraints and Uncertainty The acknowledgment timeout must be long enough to accommoda

socketio acknowledgment volatileLax River0 rep · 05 May 2025, 12:54 UTC

Editorial question30.5K views4,021 votes0 answers3,867 following

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Disk nCache vs. Live Nucleus Solving: Which Invalidation Policy for Heavy nCloth Playback?

For a heavy nCloth shot requiring real-time playback, Maya offers two documented paths: live Nucleus solving while scrubbing, or disk-based nCache created via nCache > Create New Cache. In current Maya versions, the disk cache provides stable frame timing, but Maya does not automatically invalidate stored frames when certain upstream inputs change, such a

ncache nucleus nclothNeel River0 rep · 05 May 2025, 09:00 UTC

Editorial question11.5K views4,267 votes0 answers2,229 following

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Component Rendering Without Production Credentials in Framework7

Framework7 UI Testing Scope The goal is to verify isolated UI component rendering within Framework7 without requiring live production credentials. Constraints and Uncertainty Mock data structures are available for simulating API responses, but the exact scope of what can be tested without any backend interaction remains uncertain across versions. Does Framew

ui-testing

framework7 mock-dataCig Lane0 rep · 03 May 2025, 06:36 UTC

Editorial question73.2K views799 votes0 answers2,164 following

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Array section bounds checking fails when paginating large allocatable arrays in Fortran

Array Section Bounds Checking Failure During Pagination When implementing pagination for large datasets in Fortran, developers typically use array slicing with calculated offsets to access specific page ranges. For example, given a large allocatable array data(n_total) , a page starting at index offset = (page-1)*page_size + 1 with size page_size would be ac

bounds-checking pagination array-slicingCig Lane0 rep · 02 May 2025, 17:54 UTC

Editorial question35.3K views2,717 votes0 answers2,928 following

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C-order or F-order: which layout for column-wise NumPy reductions?

C-order vs F-order for a column-heavy reduction workload Consider a NumPy 2.x design where large 2-D float64 arrays, too big to stay in CPU cache, are produced as C-order row-major buffers. The dominant cost is a reduction along axis 0 (column-wise), repeated many times, with only occasional row-wise passes along axis 1. The documented trade-off is clear at

performance memory-layout arraysMira Lane0 rep · 27 Apr 2025, 01:56 UTC

Editorial question92.5K views4,274 votes0 answers1,645 following

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Liquibase 4.25: Rollback SQL for MySQL 8.0 FK Still Incomplete

Testing Migrations Without Exposing Production Credentials The goal is to validate Liquibase changesets in a sandbox while avoiding any use of live production credentials. Liquibase 4.25 introduces the rollbackSQL command, which outputs the exact SQL needed to revert a changeset. By pointing Liquibase at an in‑memory H2 database or a Docker‑based MySQL 8.0 i

mysql80 testing

liquibaseRahul Vale0 rep · 25 Apr 2025, 07:11 UTC