In the case of high memory usage the input string is unlikely to
be in cache, so may be it's better to optimize cache misses
instead of computation speed.
On Sunday, 23 June 2013 at 21:22:40 UTC, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant
contributor to compilation time (3.25% of total time). So
making it faster is a win. Even
On 06/24/2013 03:43 AM, Juan Manuel Cabo wrote:
I used words and lines from the complete works of Shakespeare.
I tested separating the loop from the switch, as was suggested
in Timon Gehr post. It didn't improve the speed when compiled
with g++ -O3, though it improved it a bit without -O3.
On Sunday, 23 June 2013 at 21:22:40 UTC, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant
contributor to compilation time (3.25% of total time). So
making it faster is a win. Even
qznc:
To make dmd 1% faster, calcHash must be reduced to 69% run
time. Does not look possible.
I think the main problem to solve is to reduce the amount of
memory used during the compilation.
Bye,
bearophile
On Monday, 24 June 2013 at 14:36:03 UTC, bearophile wrote:
qznc:
To make dmd 1% faster, calcHash must be reduced to 69% run
time. Does not look possible.
I think the main problem to solve is to reduce the amount of
memory used during the compilation.
Yes, my profiling show that were I
On Monday, 24 June 2013 at 15:29:55 UTC, deadalnix wrote:
On Monday, 24 June 2013 at 14:36:03 UTC, bearophile wrote:
qznc:
To make dmd 1% faster, calcHash must be reduced to 69% run
time. Does not look possible.
I think the main problem to solve is to reduce the amount of
memory used
On Monday, 24 June 2013 at 11:11:42 UTC, qznc wrote:
On Sunday, 23 June 2013 at 21:22:40 UTC, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant
contributor to compilation time (3.25%
On 6/24/2013 1:08 PM, Anders Halager wrote:
Python is one of the slower interpreted languages. It would be more interesting
to look at luajit which actually does something clever.
If the string is at least 4 chars long it only hashes the first 4 bytes, the
last 4, the 4 starting at
On Monday, 24 June 2013 at 20:19:31 UTC, Walter Bright wrote:
On 6/24/2013 1:08 PM, Anders Halager wrote:
Python is one of the slower interpreted languages. It would be
more interesting
to look at luajit which actually does something clever.
If the string is at least 4 chars long it only
On 6/24/13 5:56 PM, Anders Halager wrote:
On Monday, 24 June 2013 at 20:19:31 UTC, Walter Bright wrote:
On 6/24/2013 1:08 PM, Anders Halager wrote:
Python is one of the slower interpreted languages. It would be more
interesting
to look at luajit which actually does something clever.
If the
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant contributor to
compilation time (3.25% of total time). So making it faster is a win. Even
making dmd 1% faster would be a nice win - all those little
On 06/23/2013 11:22 PM, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant contributor to
compilation time (3.25% of total time). So making it faster is a win.
Even making dmd 1%
On 06/23/2013 06:22 PM, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant contributor to
compilation time (3.25% of total time). So making
it faster is a win. Even making dmd 1%
On 06/23/2013 11:22 PM, Walter Bright wrote:
Profiling shows the calcHash function is a significant contributor to
compilation time (3.25% of total time). So making it faster is a win.
Even making dmd 1% faster would be a nice win - all those little drops
add up.
You'll find a benchmark at
On 06/23/2013 09:20 PM, Juan Manuel Cabo wrote:
On 06/23/2013 06:22 PM, Walter Bright wrote:
https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function is a significant contributor to
compilation time (3.25% of total time). So
On Sun, Jun 23, 2013 at 2:22 PM, Walter Bright
newshou...@digitalmars.comwrote:
https://github.com/D-**Programming-Language/dmd/blob/**
master/src/root/stringtable.c#**L21https://github.com/D-Programming-Language/dmd/blob/master/src/root/stringtable.c#L21
Profiling shows the calcHash function
https://code.google.com/p/xxhash/
BSD 2-Clause License
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