Trying to generate Lorem Ipsum at maximum throughput.
In order to keep a fair comparison between implementations, here I define some constraints for valid "Lorem Ipsum" text.
Lorem Ipsum text MUST
- seem random and non-repetitive
- be a concatenation of paragraphs, separated by
\n\n - only contain valid words/separators (null bytes in the output would increase throughput, so that's not valid)
Paragraphs MUST
- randomly contain between 3 to 8 sentences
- be a concatenation of sentences, separated by
Sentences MUST
- start with a capital letter
- end with a period
- have random length between 3 and 40 words
- randomly contain 0 to 1 comma if length is in
(3, 6] - randomly contain 0 to 2 commas if length is in
(6, 12] - randomly contain 1 to 4 commas otherwise
Words MUST
- be defined in the Lorem Ipsum vocabulary (
vocab.h)
Performance is measured using ./loremgenerator | pv > /dev/null on my computer:
- Processor: Intel® Core™ i7-8565U CPU @ 1.80GHz (8 threads)
- Memory: 16GB
- OS: Ubuntu 20.04.3 LTS
- Kernel: Linux 5.4.0-89-generic x86_64
Programs are compiled with GCC 11.2 with level 3 optimization enabled (-O3).
| Generator | Throughput |
|---|---|
naive.c |
236 MiB/s |
parallel_write.c |
3.74 GiB/s |
TODO: Graph throughput over time.