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Spectrum dominates the server↔client connection, and all three things that govern its cost were working against a poor link. **It was polled, one round trip per frame.** The client asked for a frame every 50 ms on a dedicated connection and waited for the reply, so the frame rate was capped at 1/RTT — on a 200 ms link, five frames a second no matter what was configured. Add SubscribeSpectrum alongside the existing SubscribeMeter: the server pushes frames from a per-rig broadcast that rig_task fills only while somebody is subscribed. A server too old to know the command answers with an error and leaves the connection usable, so the client falls back to polling on the same connection without reconnecting. **Bins were JSON floats.** 1024 bins spelled out as decimal text is around 10 KB a frame, ~200 KB/s at full rate — while the very next hop, client to browser, already sends the same information as base64 i8 in about 1.4 KB. Bins now travel base64-encoded whole dBFS, the resolution the display draws at anyway. Decoding still accepts the old array form. **Nothing was tunable.** [sdr].spectrum_fft_size and [sdr].spectrum_interval_ms replace the compile-time FFT size and cadence; [[remotes]].spectrum_interval_ms lets the client ask for less. 512 bins at 5 frames/s is roughly 3.5 KB/s against roughly 200 KB/s before. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SyX26FCpMQxiBoC7r5K1A7 Signed-off-by: Stan Grams <sjg@haxx.space>
21 lines
585 B
TOML
21 lines
585 B
TOML
# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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[package]
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name = "trx-core"
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version.workspace = true
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edition = "2021"
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[dependencies]
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tokio = { workspace = true, features = ["full"] }
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serde = { workspace = true, features = ["derive"] }
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serde_json = { workspace = true }
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tracing = { workspace = true }
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flate2 = { workspace = true }
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uuid = { workspace = true }
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ts-rs = { version = "12.0.1", features = ["uuid-impl"] }
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sgp4 = "2"
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reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
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base64 = "0.22"
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