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README.md

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+# interpreter-binary-perf
+
+Brief performance testing of binary/decimal conversion functions in different scripting interpreters.
+
+## Test conditions
+
+Performed under bit noisy conditions (web browser + media player open, etc).
+
+Each test was run 3x, reporting the best time
+
+All tests are single-threaded.
+
+```
+cat /proc/cpuinfo | grep bogo | head -1
+bogomips        : 6618.86
+```
+
+All packages are from Debian Buster except where indicated.
+
+- Perl v5.28.1
+- Python2 v2.7.16
+- Python3 v3.7.3
+- PHP v7.3.14-1
+- Node.js v10.20.1 *(nodesource.com distribution)* 
+- Ruby v2.5.5p157
+
+## Raw loop performance
+
+|Language     |Time(real)|Command
+|-------------|----------|--------
+|Perl5        |0m0.308s  |`time perl -e 'for($i = 0; $i < 10000000; ++$i) {}'`
+|Python2      |0m0.502s  |`time python2 -c 'for i in range(10000000): pass'`
+|Python3      |0m0.302s  |`time python3 -c 'for i in range(10000000): pass'`
+|PHP          |0m0.249s  |`time php -r 'for($i = 0; $i < 10000000; ++$i);'`
+|Node.js ⭐    |0m0.075s  |`time node -e 'for(let i = 0; i < 10000000; ++i);'`
+|Ruby         |0m0.409s  |`time ruby -e 'for i in 0..10000000 ; end'`
+
+## Binary to decimal
+
+- Use 511 as sample value to bypass 8-bit interning
+
+|Language     |Time(real)|Command
+|-------------|----------|--------
+|Perl5        |0m4.745s  |`time perl -e 'for($i = 0; $i < 10000000; ++$i) { oct("0b" + "111111111") }'`
+|Python2      |0m1.794s  |`time python2 -c 'for i in range(10000000): int("111111111", 2)'`
+|Python3      |0m1.953s  |`time python3 -c 'for i in range(10000000): int("111111111", 2)'`
+|PHP          |0m13.146s |`time php -r 'for($i = 0; $i < 10000000; ++$i) bindec("111111111");'`
+|Node.js ⭐    |0m0.709s  |`time node -e 'for(let i = 0; i < 10000000; ++i) { parseInt("111111111", 2) }'`
+|Ruby         |0m1.313s  |`time ruby -e 'for i in 0..10000000 ; "111111111".to_i(2) ; end'`
+
+## Decimal to binary
+
+- Use 257 as sample value to bypass small-integer interning
+
+|Language     |Time(real)|Command
+|-------------|----------|--------
+|Perl5 ⭐      |0m0.367s  |`time perl -e 'for($i = 0; $i < 10000000; ++$i) { sprintf("%b", 257) }'`
+|Python2      |0m1.519s  |`time python2 -c 'for i in range(10000000): bin(257)[2:]'`
+|Python2 (alt)|0m2.697s  |`time python2 -c 'for i in range(10000000): "{:b}".format(257)'`
+|Python3      |0m1.988s  |`time python3 -c 'for i in range(10000000): bin(257)[2:]'`
+|Python3 (alt)|0m2.196s  |`time python3 -c 'for i in range(10000000): "{:b}".format(257)'`
+|PHP          |0m14.038s |`time php -r 'for($i = 0; $i < 10000000; ++$i) decbin(257);'`
+|Node.js      |0m1.594s  |`time node -e 'for(let i = 0; i < 10000000; ++i) { (257).toString(2) }'`
+|Ruby         |0m1.706s  |`time ruby -e 'for i in 0..10000000 ; 257.to_s(2) ; end'`