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Unroll a loop in the parser for a performance increase.

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FossilOrigin-Name: a6dc29e4d5e13949e0fcd9d5dde575c2670eb10a230ab9df3806fc8c3016c540
This commit is contained in:
drh
2023-12-02 01:38:53 +00:00
parent 5ec9c916ad
commit 6df61985d4
3 changed files with 18 additions and 9 deletions
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12
manifest
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@@ -1,5 +1,5 @@
C Fix\sharmless\scompiler\swarnings\sand\senhance\sperformance\sthe\sparser. C Unroll\sa\sloop\sin\sthe\sparser\sfor\sa\sperformance\sincrease.
D 2023-12-02T01:06:33.225 D 2023-12-02T01:38:53.624
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -688,7 +688,7 @@ F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6 F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6
F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276 F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276
F src/json.c 58c3ded3bdc94125235a805214016147ecd63f8173cff19a7084c9fb0ea0ff9c F src/json.c 5363d3a9e6d4f8a77b735f279aedc0139f5ba4a1c6dff5052cc8b8f31012d9ef
F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
F src/loadext.c 7432c944ff197046d67a1207790a1b13eec4548c85a9457eb0896bb3641dfb36 F src/loadext.c 7432c944ff197046d67a1207790a1b13eec4548c85a9457eb0896bb3641dfb36
F src/main.c 1b89f3de98d1b59fec5bac1d66d6ece21f703821b8eaa0d53d9604c35309f6f9 F src/main.c 1b89f3de98d1b59fec5bac1d66d6ece21f703821b8eaa0d53d9604c35309f6f9
@@ -2145,8 +2145,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 68d191f40e708962ec88e0c245b4496bc4a671300484b1cc0f3fc7e6d199a6e6 P 285633da6d188547e52f07779e209c9e5f3dc33ce0668e14858f3337889ef4b8
R 398de78fe5dea0e1b0bc6535ce40a9fc R 5a9d6175e86127f56f06090dd3d036f6
U drh U drh
Z c1eeb98e2ab1260bdea70d2e8aff46bd Z 9e063f5d4d8d31b6e06beb4f188d0a08
# Remove this line to create a well-formed Fossil manifest. # Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@@ -1 +1 @@
285633da6d188547e52f07779e209c9e5f3dc33ce0668e14858f3337889ef4b8 a6dc29e4d5e13949e0fcd9d5dde575c2670eb10a230ab9df3806fc8c3016c540

13
src/json.c
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@@ -1391,8 +1391,16 @@ json_parse_restart:
opcode = JSONB_TEXT; opcode = JSONB_TEXT;
parse_string: parse_string:
cDelim = z[i]; cDelim = z[i];
for(j=i+1; 1; j++){ j = i+1;
if( jsonIsOk[(unsigned char)z[j]] ) continue; while( 1 /*exit-by-break*/ ){
if( jsonIsOk[(u8)z[j]] ){
if( jsonIsOk[(u8)z[j+1]] ){
j += 2;
continue;
}else{
j += 1;
}
}
c = z[j]; c = z[j];
if( c==cDelim ){ if( c==cDelim ){
break; break;
@@ -1421,6 +1429,7 @@ json_parse_restart:
pParse->iErr = j; pParse->iErr = j;
return -1; return -1;
} }
j++;
} }
jsonBlobAppendNodeType(pParse, opcode, j-1-i); jsonBlobAppendNodeType(pParse, opcode, j-1-i);
jsonBlobAppendNBytes(pParse, (const u8*)&z[i+1], j-1-i); jsonBlobAppendNBytes(pParse, (const u8*)&z[i+1], j-1-i);