Attachment 349398 Details for Bug 189501 – Patch

[patch] Patch

bug-189501-20180912004943.patch (text/plain), 6.96 KB, created by Yusuke Suzuki on 2018-09-11 08:49:44 PDT

(hide)

Description:

Filename:

MIME Type:

Creator: Yusuke Suzuki

Created: 2018-09-11 08:49:44 PDT

Size: 6.96 KB

patch

obsolete

>Subversion Revision: 235892
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index e60abee4189f1442afc52c598099305a20175ed1..0b8548227e2594b7f6c3713aa9929109c99f393d 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1 +1,26 @@
>+2018-09-11  Yusuke Suzuki  <yusukesuzuki@slowstart.org>
>+
>+        Shrink size of ResourseResponseBase
>+        https://bugs.webkit.org/show_bug.cgi?id=189501
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        We reduce the size of ResourceResponseBase by the following two optimizations.
>+
>+        1. Use bitfields for bool flags and reorder them.
>+
>+        2. Use Markable<> in CacheControlDirectives, which is held by ResourceResponseBase.
>+
>+        This patch reduces the size of ResourceResponseBase from 416 to 392 bytes.
>+
>+        No behavior change.
>+
>+        * platform/network/CacheValidation.h:
>+        (WebCore::CacheControlDirectives::CacheControlDirectives):
>+        * platform/network/ResourceResponseBase.cpp:
>+        (WebCore::ResourceResponseBase::ResourceResponseBase):
>+        (WebCore::ResourceResponseBase::contentRange const):
>+        * platform/network/ResourceResponseBase.h:
>+        (WebCore::ResourceResponseBase::decode):
>+
> == Rolled over to ChangeLog-2018-09-11 ==
>diff --git a/Source/WebCore/platform/network/CacheValidation.h b/Source/WebCore/platform/network/CacheValidation.h
>index f415ca8b2e13576dd3cb1072743d625be1c3e8fe..da990769b42d1e2d9782b9913f14a04be81c7f7d 100644
>--- a/Source/WebCore/platform/network/CacheValidation.h
>+++ b/Source/WebCore/platform/network/CacheValidation.h
>@@ -26,6 +26,7 @@
> #pragma once
> 
> #include <pal/SessionID.h>
>+#include <wtf/Markable.h>
> #include <wtf/Optional.h>
> #include <wtf/Vector.h>
> #include <wtf/WallTime.h>
>@@ -60,12 +61,19 @@ enum ReuseExpiredRedirectionOrNot { DoNotReuseExpiredRedirection, ReuseExpiredRe
> WEBCORE_EXPORT bool redirectChainAllowsReuse(RedirectChainCacheStatus, ReuseExpiredRedirectionOrNot);
> 
> struct CacheControlDirectives {
>-    std::optional<Seconds> maxAge;
>-    std::optional<Seconds> maxStale;
>-    bool noCache { false };
>-    bool noStore { false };
>-    bool mustRevalidate { false };
>-    bool immutable { false };
>+    constexpr CacheControlDirectives()
>+        : noCache(false)
>+        , noStore(false)
>+        , mustRevalidate(false)
>+        , immutable(false)
>+        { }
>+
>+    Markable<Seconds, Seconds::MarkableTraits> maxAge;
>+    Markable<Seconds, Seconds::MarkableTraits> maxStale;
>+    bool noCache : 1;
>+    bool noStore : 1;
>+    bool mustRevalidate : 1;
>+    bool immutable : 1;
> };
> WEBCORE_EXPORT CacheControlDirectives parseCacheControlDirectives(const HTTPHeaderMap&);
> 
>diff --git a/Source/WebCore/platform/network/ResourceResponseBase.cpp b/Source/WebCore/platform/network/ResourceResponseBase.cpp
>index fb914216a0fe1693cf35d0cc904b1db0484b89c1..0ef1db7cd343742f4390c460ae92c24ad5869165 100644
>--- a/Source/WebCore/platform/network/ResourceResponseBase.cpp
>+++ b/Source/WebCore/platform/network/ResourceResponseBase.cpp
>@@ -47,7 +47,17 @@ bool isScriptAllowedByNosniff(const ResourceResponse& response)
>     return MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType);
> }
> 
>-ResourceResponseBase::ResourceResponseBase() = default;
>+ResourceResponseBase::ResourceResponseBase()
>+    : m_haveParsedCacheControlHeader(false)
>+    , m_haveParsedAgeHeader(false)
>+    , m_haveParsedDateHeader(false)
>+    , m_haveParsedExpiresHeader(false)
>+    , m_haveParsedLastModifiedHeader(false)
>+    , m_haveParsedContentRangeHeader(false)
>+    , m_isRedirected(false)
>+    , m_isNull(true)
>+{
>+}
> 
> ResourceResponseBase::ResourceResponseBase(const URL& url, const String& mimeType, long long expectedLength, const String& textEncodingName)
>     : m_url(url)
>@@ -55,6 +65,13 @@ ResourceResponseBase::ResourceResponseBase(const URL& url, const String& mimeTyp
>     , m_expectedContentLength(expectedLength)
>     , m_textEncodingName(textEncodingName)
>     , m_certificateInfo(CertificateInfo()) // Empty but valid for synthetic responses.
>+    , m_haveParsedCacheControlHeader(false)
>+    , m_haveParsedAgeHeader(false)
>+    , m_haveParsedDateHeader(false)
>+    , m_haveParsedExpiresHeader(false)
>+    , m_haveParsedLastModifiedHeader(false)
>+    , m_haveParsedContentRangeHeader(false)
>+    , m_isRedirected(false)
>     , m_isNull(false)
> {
> }
>@@ -702,7 +719,7 @@ static ParsedContentRange parseContentRangeInHeader(const HTTPHeaderMap& headers
>     return ParsedContentRange(contentRangeValue);
> }
> 
>-ParsedContentRange& ResourceResponseBase::contentRange() const
>+const ParsedContentRange& ResourceResponseBase::contentRange() const
> {
>     lazyInit(CommonFieldsOnly);
> 
>diff --git a/Source/WebCore/platform/network/ResourceResponseBase.h b/Source/WebCore/platform/network/ResourceResponseBase.h
>index cb4653015477eae769d8cd34c6d6bd40ad41699a..d8fcc1431b50bc7ab67f1d1968b91ce70ea161ef 100644
>--- a/Source/WebCore/platform/network/ResourceResponseBase.h
>+++ b/Source/WebCore/platform/network/ResourceResponseBase.h
>@@ -140,7 +140,7 @@ class ResourceResponseBase {
>     WEBCORE_EXPORT std::optional<Seconds> age() const;
>     WEBCORE_EXPORT std::optional<WallTime> expires() const;
>     WEBCORE_EXPORT std::optional<WallTime> lastModified() const;
>-    ParsedContentRange& contentRange() const;
>+    const ParsedContentRange& contentRange() const;
> 
>     enum class Source : uint8_t { Unknown, Network, DiskCache, DiskCacheAfterValidation, MemoryCache, MemoryCacheAfterValidation, ServiceWorker, ApplicationCache };
>     WEBCORE_EXPORT Source source() const;
>@@ -222,20 +222,22 @@ class ResourceResponseBase {
>     mutable ParsedContentRange m_contentRange;
>     mutable CacheControlDirectives m_cacheControlDirectives;
> 
>-    mutable bool m_haveParsedCacheControlHeader { false };
>-    mutable bool m_haveParsedAgeHeader { false };
>-    mutable bool m_haveParsedDateHeader { false };
>-    mutable bool m_haveParsedExpiresHeader { false };
>-    mutable bool m_haveParsedLastModifiedHeader { false };
>-    mutable bool m_haveParsedContentRangeHeader { false };
>-    bool m_isRedirected { false };
>+    mutable bool m_haveParsedCacheControlHeader : 1;
>+    mutable bool m_haveParsedAgeHeader : 1;
>+    mutable bool m_haveParsedDateHeader : 1;
>+    mutable bool m_haveParsedExpiresHeader : 1;
>+    mutable bool m_haveParsedLastModifiedHeader : 1;
>+    mutable bool m_haveParsedContentRangeHeader : 1;
>+    bool m_isRedirected : 1;
>+protected:
>+    bool m_isNull : 1;
> 
>+private:
>     Source m_source { Source::Unknown };
>     Type m_type { Type::Default };
>     Tainting m_tainting { Tainting::Basic };
> 
> protected:
>-    bool m_isNull { true };
>     int m_httpStatusCode { 0 };
> };
> 
>@@ -310,8 +312,10 @@ bool ResourceResponseBase::decode(Decoder& decoder, ResourceResponseBase& respon
>         return false;
>     if (!decoder.decodeEnum(response.m_tainting))
>         return false;
>-    if (!decoder.decode(response.m_isRedirected))
>+    bool isRedirected = false;
>+    if (!decoder.decode(isRedirected))
>         return false;
>+    response.m_isRedirected = isRedirected;
>     response.m_isNull = false;
> 
>     return true;

Actions: View | Formatted Diff | Diff

Attachments on bug 189501: 349398 | 349413