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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 13:40:54 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 13:40:54 +0000 |
commit | 317c0644ccf108aa23ef3fd8358bd66c2840bfc0 (patch) | |
tree | c417b3d25c86b775989cb5ac042f37611b626c8a /deps/lua/test/fib.lua | |
parent | Initial commit. (diff) | |
download | redis-317c0644ccf108aa23ef3fd8358bd66c2840bfc0.tar.xz redis-317c0644ccf108aa23ef3fd8358bd66c2840bfc0.zip |
Adding upstream version 5:7.2.4.upstream/5%7.2.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | deps/lua/test/fib.lua | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/deps/lua/test/fib.lua b/deps/lua/test/fib.lua new file mode 100644 index 0000000..97a921b --- /dev/null +++ b/deps/lua/test/fib.lua @@ -0,0 +1,40 @@ +-- fibonacci function with cache + +-- very inefficient fibonacci function +function fib(n) + N=N+1 + if n<2 then + return n + else + return fib(n-1)+fib(n-2) + end +end + +-- a general-purpose value cache +function cache(f) + local c={} + return function (x) + local y=c[x] + if not y then + y=f(x) + c[x]=y + end + return y + end +end + +-- run and time it +function test(s,f) + N=0 + local c=os.clock() + local v=f(n) + local t=os.clock()-c + print(s,n,v,t,N) +end + +n=arg[1] or 24 -- for other values, do lua fib.lua XX +n=tonumber(n) +print("","n","value","time","evals") +test("plain",fib) +fib=cache(fib) +test("cached",fib) |