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String concatenation optimizations: Update title 

* Modifies the previously misleading title to be
more precise.

Related to https://github.com/satwikkansal/wtfpython/issues/38
This commit is contained in:
Satwik Kansal 2017-09-11 22:09:58 +05:30
parent 17a456adf1
commit e836b22a36
1 changed files with 2 additions and 2 deletions
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@ -455,7 +455,7 @@ def convert_list_to_string(l, iters):
---
### String concatenation interpreter optimizations.
### String interning
```py
>>> a = "some_string"
@ -473,7 +473,7 @@ def convert_list_to_string(l, iters):
#### 💡 Explanation:
+ `+=` is faster than `+` for concatenating more than two strings because the first string (example, `s1` for `s1 += s2 + s3`) is not destroyed while calculating the complete string.
+ Both the strings refer to the same object because of CPython optimization hat tries to use existing immutable objects in some cases (implementation specific) rather than creating a new object every time. You can read more about this [here](https://stackoverflow.com/questions/24245324/about-the-changing-id-of-an-immutable-string)
+ Both the strings refer to the same object because of CPython optimization that tries to use existing immutable objects in some cases (implementation specific) rather than creating a new object every time. You can read more about this [here](https://stackoverflow.com/questions/24245324/about-the-changing-id-of-an-immutable-string).
---