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refactor(tools/string): speed up strip (whitespace) #13168

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merged 1 commit into from
Jun 12, 2024

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@bungle bungle commented Jun 5, 2024

Summary

With simple microbenchmark:

ngx.update_time()
local s = ngx.now()
for i = 1, 100000 do
    local a = strip("           \t \ndogestr   \f\t\r ")
end
ngx.update_time()
local e = ngx.now()

print("took: ", (e * 1000) - (s * 1000), " ms")

I get these results:
Current: took: 57 ms
PR: took: 7 ms

KAG-4684

@bungle bungle requested a review from chronolaw June 5, 2024 19:52
@github-actions github-actions bot added the cherry-pick kong-ee schedule this PR for cherry-picking to kong/kong-ee label Jun 5, 2024
@bungle bungle force-pushed the refactor/speed-up-strip branch from 9d38b31 to 8b481d3 Compare June 5, 2024 20:43
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kong/tools/string.lua Outdated Show resolved Hide resolved
@bungle bungle force-pushed the refactor/speed-up-strip branch 3 times, most recently from c734467 to 4450845 Compare June 6, 2024 06:57
### Summary

With simple microbenchmark:
```lua
ngx.update_time()
local s = ngx.now()
for i = 1, 100000 do
    local a = strip("           \t \ndogestr   \f\t\r ")
end
ngx.update_time()
local e = ngx.now()

print("took: ", (e * 1000) - (s * 1000), " ms")
```

I get these results:
Current: `took: 57 ms`
     PR: `took: 7 ms`

Signed-off-by: Aapo Talvensaari <[email protected]>
@bungle bungle merged commit 582d5ac into master Jun 12, 2024
70 checks passed
@bungle bungle deleted the refactor/speed-up-strip branch June 12, 2024 08:44
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Successfully created cherry-pick PR for master:

locao pushed a commit that referenced this pull request Jun 21, 2024
### Summary

With simple microbenchmark:
```lua
ngx.update_time()
local s = ngx.now()
for i = 1, 100000 do
    local a = strip("           \t \ndogestr   \f\t\r ")
end
ngx.update_time()
local e = ngx.now()

print("took: ", (e * 1000) - (s * 1000), " ms")
```

I get these results:
Current: `took: 57 ms`
     PR: `took: 7 ms`

Signed-off-by: Aapo Talvensaari <[email protected]>
(cherry picked from commit 582d5ac)
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5 participants