DeroStorm 1.5.0 - A new console, GPU +9.5%, and the native sort on Linux

A new full-screen console, a faster GPU merge, and the native suffix sort on Linux at last.

The console

Eight screens, one key each: M S N T C L P H for mining,
statistics, network, threads, config, logs, pools and help, Tab to cycle,
Esc back to the dashboard, : for the command line, Q to quit.

It reflows rather than assuming a size. Panels drop out of each row as the
window narrows, columns collapse, and labels shorten before they truncate. It is
readable from about 100x32 and opens up fully around 150 columns.

• --preview draws one real frame with sample data and exits — no node, no
  wallet. --screen=<name> picks which of the eight and --size=<WxH> a window
  you do not have.
• --classic keeps the compact in-place panel from 1.4.x, which scrolls with
  the shell so the scrollback above it survives.
• --no-tui is plain scrolling lines for tmux logs, systemd units and CI.
  Colour and cursor control are off automatically when output is not a terminal
  or NO_COLOR is set.
• --termdiag reports what every source says the terminal size is and rules a
  line that wide, for the one failure that leaves the screen unreadable.
• A sixth theme, cyber, and it is now the default.

The GPU: +9.5%

The merge that resolves colliding descriptor groups gave each group to one
thread. The average group holds seven positions — which is why it was written
that way, and why the average was the wrong thing to measure. Every thread waits
at the barrier afterwards, so the phase costs whatever the busiest thread
costs, and over the 512 reference vectors that thread does 43.5% of the whole
text's merge comparisons. Of ~247 colliding groups in a text, the five or so
holding more than 32 positions carry 62% of them.

Those now go through a block-wide merge, one group at a time with all 256
threads on it; the per-thread loop keeps the ~242 small ones. The scatter was
folded into the same pass while the code was open — it and the merge were asking
the same question of the same words, about 50,000 loads a text spent re-deriving
what the previous loop had already worked out.

	1.5.0	1.4.x
RTX 5080, --bench --gpu=all	100,640 H/s	91,870 H/s
CPU, 15 threads	34,293 H/s	33,700 – 34,500 H/s
together, real mining path	130,400 – 131,800 H/s	124,700 – 125,400 H/s

Ryzen 7 9800X3D + RTX 5080. The combined figure is
--run-for=55 --gpu=all --gpu-blocks=1252 over three runs, not the sum of the
two above.

Output is bit-identical. gpu/hash_parallel_test.exe still matches all 512 CPU
vectors, and the miner still re-verifies each device against the CPU at start-up
before it will submit anything from it.

Linux gets the native suffix sort

It was packaged as a DLL and nothing had been built for anything else, so Linux
rigs were running the Go sort and reading about a quarter of the hashrate the
same hardware managed on Windows. It was never a tuning problem.

native/buildlib.sh now builds libderostorm_sa.so, and --bench on
linux/amd64 reads +248.9% at 8 threads against the Windows +260.0% on the same
row. macOS and arm64 still use the Go sort: the descriptor merge is AVX2 and the
paired hash is the x86 SHA extensions, which is a NEON port and not a recompile.

Notes

• All four embedded native libraries were rebuilt from current source before
  this release was cut — the check 1.4.1 existed to make up for.
• No configuration change. Upgrading is replacing the binary.
• Linux arm64 still ships no CUDA .so, as in every prior release.

Checksums (SHA-256)

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f0fe65bac5f661e29a5f80bba95bec1d1144cba6afc1c95b88a0633e550b1097  derostorm-1.5.0-linux-amd64.zip
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