commit 2a4113847867ccaff71ada3a38e84f26ca0007f8
parent 2cf684da56832f24b1e02a3696cc23b578791318
Author: NunoSempere <nuno.sempere@protonmail.com>
Date: Sun, 21 May 2023 01:54:03 -0400
tweaks.
Diffstat:
4 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/README.md b/README.md
@@ -2,17 +2,29 @@
## About
-This repository contains example of very simple code to manipulate samples in various programming languages. As of now, it may be useful for checking the validity of simple estimations.
+This repository contains example of very simple code to manipulate samples in various programming languages. It implements this estimate:
-The title of this repository is a pun on two meanings of "time to": "how much time does it take to do x", and "let's do x".
+```
+p_a = 0.8
+p_b = 0.5
+p_c = p_a * p_b
+
+dists = [0, 1, 1 to 3, 2 to 10] # each dist represented as 1M samples
+weights = [(1 - p_c), p_c/2, p_c/4, p_c/4 ]
+
+result = mixture(dists, weights)
+mean(result)
+```
+
+As of now, it may be useful for checking the validity of simple estimations. The title of this repository is a pun on two meanings of "time to": "how much time does it take to do x", and "let's do x".
## Current languages
-- [x] Python
-- [x] R
-- [x] Squiggle
-- [x] Javascript (NodeJS)
- [x] C
+- [x] Javascript (NodeJS)
+- [x] Squiggle
+- [x] R
+- [x] Python
- [x] Nim
## Performance table
@@ -21,7 +33,7 @@ With the [time](https://man7.org/linux/man-pages/man1/time.1.html) tool, using 1
| Language | Time |
|----------------------|-----------|
-| Nim | 0m0.183s |
+| Nim | 0m0.153s |
| C | 0m0,442s |
| Node | 0m0,732s |
| Squiggle | 0m1,536s |
@@ -30,7 +42,7 @@ With the [time](https://man7.org/linux/man-pages/man1/time.1.html) tool, using 1
I was very surprised that Node/Squiggle code was almost as fast as the raw C code. For the Python code, it's possible that the lack of speed is more a function of me not being as familiar with Python. It's also very possible that the code would run faster with [PyPy](https://doc.pypy.org).
-I was also really happy with trying [Nim](https://nim-lang.org/). The version which beats all others is just the normal usage of Nim, in the "release" compilation mode (the "danger" compilation mode shaves of a few more miliseconds). The Nim version has the particularity that I define the normal function from scratch, using the [Box–Muller transform](https://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform#Basic_form). For Nim I also have a version of the code which takes around 4 seconds, where I define some very inefficient sine & logarithm functions to feed into the Box-Muller method, because it felt like fun to really write a botec tool really from scratch.
+I was also really happy with trying [Nim](https://nim-lang.org/). The version which beats all others is just the fastest "danger" compilation of Nim (the "release" compilation is 0m0.183s instead). The Nim version has the particularity that I define the normal function from scratch, using the [Box–Muller transform](https://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform#Basic_form). For Nim I also have a version of the code which takes around 4 seconds, where I define some very inefficient sine & logarithm functions to feed into the Box-Muller method, because it felt like fun to really write a botec tool really from scratch.
## Languages I may add later
diff --git a/nim/makefile b/nim/makefile
@@ -8,5 +8,6 @@ run: samples
./samples $(VERBOSE)
examine: samples
+ nim c $(VERBOSE) samples.nim && time ./samples $(VERBOSE) && echo
nim c $(VERBOSE) -d:release samples.nim && time ./samples $(VERBOSE) && echo
nim c $(VERBOSE) -d:danger samples.nim && time ./samples $(VERBOSE)
diff --git a/nim/samples b/nim/samples
Binary files differ.
diff --git a/time.txt b/time.txt
@@ -38,16 +38,23 @@ sys 0m0,052s
## Nim
+nim c --verbosity:0 samples.nim && time ./samples --verbosity:0 && echo
+0.8881633539025908
+
+real 0m0.706s
+user 0m0.685s
+sys 0m0.020s
+
nim c --verbosity:0 -d:release samples.nim && time ./samples --verbosity:0 && echo
-0.8873815480558296
+0.8861663545062978
-real 0m0.183s
-user 0m0.150s
+real 0m0.184s
+user 0m0.151s
sys 0m0.032s
nim c --verbosity:0 -d:danger samples.nim && time ./samples --verbosity:0
-0.8886260086130379
+0.8879220244477399
-real 0m0.157s
-user 0m0.136s
-sys 0m0.020s
+real 0m0.158s
+user 0m0.130s
+sys 0m0.028s
