advent2025

commit 2129814c57535c3c9de6fdc3e61a04a0d936e18d
parent e9fee17c5f93ddfe217f630b241884cd998087d5
Author: bsandro <email@bsandro.tech>
Date:   Sat, 13 Dec 2025 00:18:50 +0200

added readme and rutimes data with gnuplot script

Diffstat:
A
README
 | 
23
+++++++++++++++++++++++
A
runtimes.plt
 | 
12
++++++++++++
A
runtimes.txt
 | 
13
+++++++++++++

3 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/README b/README
@@ -0,0 +1,23 @@
+Advent of Code 2025 solutions.
+
+License: BSD 2-Clause.
+Language: C
+Requirements: C99-conformant compiler, GNU make. Day 10 part 2 requires GLPK library.
+
+Each .c file contains both parts of the corresponding day puzzle.
+
+Day 8 is unoptimized crap, works 45 seconds even on my Ryzen 3900X, be advised. I didn't include it into stats described below.
+
+Day 11 built with clang v19.1.7 on NetBSD i386 crashes with memory error if built with -O2 or -O3 option. -O1 works fine.
+
+Tested on different architectures and operating systems: 
+
+- amd64: Ryzen 3900X with Fedora 43
+- i386: Celeron 633MHz (Coppermine, socket370) with NetBSD 10.1
+- riscv64: Starfive VisionFive 2 board with Debian Bookworm/sid
+- ppc32: PowerPC G4 1.33GHz (iBook G4) with MacOS X 10.5.8
+- arm64: Pinebook Pro with Manjaro-ARM 24.03
+
+I've used both gcc6 and gcc-mp-14 from ports on OSX; gcc6 binaries are slower.
+
+Saved run times for posterity in runtimes.txt, there is a gnuplot script (runtimes.plt) to make visualization.
diff --git a/runtimes.plt b/runtimes.plt
@@ -0,0 +1,12 @@
+#!/usr/bin/gnuplot
+
+set title "Run time per machine, seconds"
+set xlabel "Day"
+set ylabel "Seconds"
+set grid
+set style data histogram
+set style fill solid border -1
+set logscale y
+set key top left outside
+
+plot for [i=2:6] 'runtimes.txt' using i:xtic(1) title col
diff --git a/runtimes.txt b/runtimes.txt
@@ -0,0 +1,13 @@
+Day amd64   i386    powerpc   riscv64 arm64 
+01  0.0001  0.03    0.0025    0.0011  0.001 
+02  0.14    3.53    4.74      9.6     4.83  
+03  0.0002  0.05    0.0016    0.0017  0.001 
+04  0.002   0.06    0.011     0.021   0.013 
+05  0.003   0.06    0.003     0.0033  0.003 
+06  0.0002  0.05    0.002     0.0022  0.001 
+07  0.0001  0.09    0.0014    0.001   0.001 
+08  0       0       0         0       0
+09  0.04    0.86    0.42      0.42    0.17  
+10  0.89    33.0    9.26      9.8     5.00  
+11  0.34    9.14    1.93      4.17    1.9   
+12  0.0001  0.03    0.0037    0.0019  0.001