Single quoted string was faster ages ago. Not sure but think it was before 5.3. Anyway - when we talk about 5.6+ PHP versions parsing double quotes is faster then concatenation. php.net/manual/en/language.types.s...
Hi Andrey! Thanks for sharing, it's a really interesting test. I reproduced the test in my local environment with PHP 7.1 and I had the same result. It seams that for the last PHP release (PHP 7.x) something is changed. I'm going to update the article.
Hey! Did it with pleasure, just because "single vs double quotes" thing makes me crazy. There is another old good article, that shows difference from inside nikic.github.io/2012/01/09/Disprov...
And just to make examples fully correct - concatenation is bit faster with only one variable, but it slows down with each variable you add.
And after all - according to test on php.net, using single quotes instead of double quotes is 0,5ms faster for 1 million strings, but, how many strings you have in your project? If amount for each page load is close to at least 10k strings - maybe it's time for some refactoring?
In my way of thinking it's more about habits than refactoring. I study new things and write articles to improve my habits. If my skills improve, then slowly the applications I'm working on will change for the better.
I don't think the impact on performance is business critical, so I don't think a refactoring task is necessary. Invest in skills and you (or your collaborators) will get the same result automatically.
I understand your point, and fully agree. I think it's again problem that i can't explain what's on my mind, damn my bad english ). I just trying to say that it's not so much strings in enough good designed project, and using "fastest" quotes for each case won't give you real profit. IMHO good choice is select quotes for better readability and team codestyle.
*sneaks in and whispers* As long as no variables are replaced, there is no significant difference between single and double quotes. I did a quick benchmark today with PHP 7.4:
See discussion in my recent article about PHP performance optimization:
Single quoted string was faster ages ago. Not sure but think it was before 5.3. Anyway - when we talk about 5.6+ PHP versions parsing double quotes is faster then concatenation.
php.net/manual/en/language.types.s...
Hi Andrey! Thanks for sharing, it's a really interesting test. I reproduced the test in my local environment with PHP 7.1 and I had the same result. It seams that for the last PHP release (PHP 7.x) something is changed. I'm going to update the article.
Hey! Did it with pleasure, just because "single vs double quotes" thing makes me crazy. There is another old good article, that shows difference from inside nikic.github.io/2012/01/09/Disprov...
And just to make examples fully correct - concatenation is bit faster with only one variable, but it slows down with each variable you add.
And after all - according to test on php.net, using single quotes instead of double quotes is 0,5ms faster for 1 million strings, but, how many strings you have in your project? If amount for each page load is close to at least 10k strings - maybe it's time for some refactoring?
In my way of thinking it's more about habits than refactoring. I study new things and write articles to improve my habits. If my skills improve, then slowly the applications I'm working on will change for the better.
I don't think the impact on performance is business critical, so I don't think a refactoring task is necessary. Invest in skills and you (or your collaborators) will get the same result automatically.
I understand your point, and fully agree. I think it's again problem that i can't explain what's on my mind, damn my bad english ). I just trying to say that it's not so much strings in enough good designed project, and using "fastest" quotes for each case won't give you real profit. IMHO good choice is select quotes for better readability and team codestyle.
*sneaks in and whispers* As long as no variables are replaced, there is no significant difference between single and double quotes. I did a quick benchmark today with PHP 7.4:
See discussion in my recent article about PHP performance optimization:
4 PHP Tricks to Boost Script Performance
Andreas ・ Apr 14 ・ 3 min read
*sneaks out*