trimmer is an alternative implementation of the standard Go strings.Trim, strings.TrimLeft, and strings.TrimRight functions.
Runes to be trimmed away are stored in a bitset for quick retrieval.
On average, trimmer executes at least twice as fast as strings.Trim.
Spot any bugs? Report them here.
go get github.com/elliotwutingfeng/trimmerconst charsToTrim string = "@👍🏽新 "
var cutset *intset.Rune = MakeRuneSet(charsToTrim)
fmt.Println(FastTrim("", cutset, TrimBoth))
fmt.Println(strings.Trim("", "@👍🏽新 "))
fmt.Println(FastTrim(" ", cutset, TrimBoth))
fmt.Println(strings.Trim(" ", "@👍🏽新 "))
fmt.Println(FastTrim("@b👍🏽新", cutset, TrimBoth))
fmt.Println(strings.Trim("@b👍🏽新", "@👍🏽新 "))
fmt.Println(FastTrim("@b👍🏽新", cutset, TrimLeft))
fmt.Println(strings.TrimLeft("@b👍🏽新", "@👍🏽新 "))
fmt.Println(FastTrim("@b👍🏽新", cutset, TrimRight))
fmt.Println(strings.TrimRight("@b👍🏽新", "@👍🏽新 "))
fmt.Println(FastTrim("@b👍新", cutset, TrimRight))
fmt.Println(strings.TrimRight("@b👍新", "@👍🏽新 "))
//Output:
//
//
//b
//b
//b👍🏽新
//b👍🏽新
//@b
//@b
//@b
//@bmake tests
# Alternatively, run tests without race detection
# Useful for systems that do not support the -race flag like windows/386
# See https://tip.golang.org/src/cmd/dist/test.go
make tests_without_racemake benchThe following chart indicates total time taken to trim characters @👍🏽新 from strings in https://github.com/minimaxir/big-list-of-naughty-strings. The strings have been modified to include prefix and/or suffix permutations with replacement of up to length 4 from the set @👍🏽新.
CPU: AMD Ryzen 7 5800X
Time in milliseconds (ms) | Lower is better
MakeRuneSet ▏ .08
FastTrim ▏ 252 🟦🟦🟦🟦🟦🟦🟦🟦🟦
FastTrimLeft ▏ 113 🟦🟦🟦🟦
FastTrimRight ▏ 167 🟦🟦🟦🟦🟦🟦
Trim ▏ 680 🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥
TrimLeft ▏ 342 🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥
TrimRight ▏ 382 🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥🟥
The cutset (characters to be trimmed) must be initialized as *intset.Rune first. This incurs a small time cost.
const charsToTrim string = "@👍🏽新 "
var cutset *intset.Rune = MakeRuneSet(charsToTrim) // this incurs a small time costUse the Go Standard library if you only need to process a small amount of strings (10 strings or less) per given cutset. However, for larger amounts of strings per given cutset, trimmer will greatly outperform the standard library.