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Optimize Writer::WriteString() with SIMD

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This commit is contained in:
Milo Yip
2016-02-14 17:37:53 +08:00
parent c974997d05
commit 6a6d9c7e05
4 changed files with 118 additions and 4 deletions
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46
test/unittest/simdtest.cpp
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@@ -28,6 +28,7 @@
#include "unittest.h"
#include "rapidjson/reader.h"
#include "rapidjson/writer.h"
#ifdef __GNUC__
RAPIDJSON_DIAG_PUSH
@@ -108,6 +109,51 @@ TEST(SIMD, SIMD_SUFFIX(ScanCopyUnescapedString)) {
TestScanCopyUnescapedString<kParseInsituFlag, InsituStringStream>();
}
TEST(SIMD, SIMD_SUFFIX(ScanWriteUnescapedString)) {
for (size_t step = 0; step < 1024; step++) {
char s[2048 + 1];
char *p = s;
for (size_t i = 0; i < step; i++)
*p++= "ABCD"[i % 4];
char escape = "\0\n\\\""[step % 4];
*p++ = escape;
for (size_t i = 0; i < step; i++)
*p++= "ABCD"[i % 4];
StringBuffer sb;
Writer<StringBuffer> writer(sb);
writer.String(s, SizeType(step * 2 + 1));
const char* q = sb.GetString();
EXPECT_EQ('\"', *q++);
for (size_t i = 0; i < step; i++)
EXPECT_EQ("ABCD"[i % 4], *q++);
if (escape == '\0') {
EXPECT_EQ('\\', *q++);
EXPECT_EQ('u', *q++);
EXPECT_EQ('0', *q++);
EXPECT_EQ('0', *q++);
EXPECT_EQ('0', *q++);
EXPECT_EQ('0', *q++);
}
else if (escape == '\n') {
EXPECT_EQ('\\', *q++);
EXPECT_EQ('n', *q++);
}
else if (escape == '\\') {
EXPECT_EQ('\\', *q++);
EXPECT_EQ('\\', *q++);
}
else if (escape == '\"') {
EXPECT_EQ('\\', *q++);
EXPECT_EQ('\"', *q++);
}
for (size_t i = 0; i < step; i++)
EXPECT_EQ("ABCD"[i % 4], *q++);
EXPECT_EQ('\"', *q++);
EXPECT_EQ('\0', *q++);
}
}
#ifdef __GNUC__
RAPIDJSON_DIAG_POP
#endif